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Voyager 1 defies the odds yet again and is back online
By Andrew Paul
Posted on Jun 14, 2024 9:30 AM EDT
3 minute read
Voyager 1 defied the odds yet again—after over six months of technical issues potentially foreshadowing humanity’s final farewell to the historic spacecraft, NASA reports all four of the probe’s instruments are “conducting normal science operations” once more. In its June 13 announcement , the agency notes that while the probe is back to studying interstellar particles, magnetic fields, and plasma waves, “minor work” is still needed to fix lingering issues like resynchronizing Voyager 1’s timekeeping software across its three onboard computers. Additional maintenance is also required for a digital tape recorder responsible for recording portions of the plasma wave instrument data that Voyager 1 transmits back to Earth twice a year. Still, the fact that NASA can report all of the probe’s instruments are now collecting “usable science data” is a remarkable return from the near-dead.
It’s been a tense few months for the Voyager 1 team after mission control first detected technical issues within its flight data subsystem’s telemetry module unit back in November 2023 . Engineers estimated a potential fix would likely take several weeks at minimum, given the roughly two-day communications time lag for any message sent between NASA and the spacecraft—now over 15 billion miles from Earth and beyond the boundaries of our solar system.
[Related: Voyager 1 is sending back bad data, but NASA is on it .]
In April, the team confirmed a successful partial fix after Voyager 1 regained the ability to beam back engineering data. According to NASA’s Thursday news post, mission engineers initiated the second step of the repair on May 19, instructing the spacecraft to begin returning its science data, as well. Two of the four equipment arrays restored normal operations immediately, while the other pair required a bit more backend work.
Every additional day Voyager 1 and 2 remain in working condition is another day that exceeds expectations. Launched in 1977, the spacecraft were originally intended to only conduct a five-year mission to observe the moons and rings of Saturn and Jupiter, after which engineers assumed the pair would eventually go offline for good. By 1989, however, NASA celebrated Voyager 2 ’s unscheduled flyby of Neptune, with both craft soon passing beyond the heliosphere into interstellar space.
Over 45 years later, the Voyager craft continue their unprecedented and unanticipated journeys, by now outlasting some of their human creators—Ed Stone, who served as the mission’s project scientist for 50 years, passed away on June 8 at the age of 88.
“It has been a remarkable journey, and I’m thankful to everyone around the world who has followed Voyager and joined us on this adventure,” Stone said upon retiring in 2022.
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Voyager 1 Returning Science Data From All Four Instruments
![voyager 1 is it still working](https://d2pn8kiwq2w21t.cloudfront.net/images/Voyager_7-copy-AC.width-1024.jpg)
An artist’s concept of the Voyager spacecraft.
The spacecraft has resumed gathering information about interstellar space.
NASA’s Voyager 1 spacecraft is conducting normal science operations for the first time following a technical issue that arose in November 2023.
The team partially resolved the issue in April when they prompted the spacecraft to begin returning engineering data, which includes information about the health and status of the spacecraft. On May 19, the mission team executed the second step of that repair process and beamed a command to the spacecraft to begin returning science data. Two of the four science instruments returned to their normal operating modes immediately. Two other instruments required some additional work, but now, all four are returning usable science data.
The four instruments study plasma waves, magnetic fields, and particles. Voyager 1 and Voyager 2 are the only spacecraft to directly sample interstellar space, which is the region outside the heliosphere — the protective bubble of magnetic fields and solar wind created by the Sun.
Need Some Space?
While Voyager 1 is back to conducting science, additional minor work is needed to clean up the effects of the issue. Among other tasks, engineers will resynchronize timekeeping software in the spacecraft’s three onboard computers so they can execute commands at the right time. The team will also perform maintenance on the digital tape recorder, which records some data for the plasma wave instrument that is sent to Earth twice per year. (Most of the Voyagers’ science data is sent directly to Earth and not recorded.)
Voyager 1 is more than 15 billion miles (24 billion kilometers) from Earth, and Voyager 2 is more than 12 billion miles (20 billion kilometers) from the planet. The probes will mark 47 years of operations later this year. They are NASA’s longest-running and most-distant spacecraft. Both spacecraft flew past Jupiter and Saturn, while Voyager 2 also flew past Uranus and Neptune.
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The most distant human-made object
![voyager 1 is it still working Computer-generated view of a Voyager spacecraft far from the Sun.](https://science.nasa.gov/wp-content/uploads/2017/12/voyager.png?w=4096&format=png)
No spacecraft has gone farther than NASA's Voyager 1. Launched in 1977 to fly by Jupiter and Saturn, Voyager 1 crossed into interstellar space in August 2012 and continues to collect data.
Mission Type
What is Voyager 1?
Voyager 1 has been exploring our solar system since 1977. The probe is now in interstellar space, the region outside the heliopause, or the bubble of energetic particles and magnetic fields from the Sun. Voyager 1 was launched after Voyager 2, but because of a faster route it exited the asteroid belt earlier than its twin, and it overtook Voyager 2 on Dec. 15, 1977.
- Voyager 1 discovered a thin ring around Jupiter and two new Jovian moons: Thebe and Metis.
- At Saturn, Voyager 1 found five new moons and a new ring called the G-ring.
- Voyager 1 was the first spacecraft to cross the heliosphere, the boundary where the influences from outside our solar system are stronger than those from our Sun.
- Voyager 1 is the first human-made object to venture into interstellar space.
In Depth: Voyager 1
Voyager 1 at jupiter.
Voyager 1 began its Jovian imaging mission in April 1978 at a range of 165 million miles (265 million km) from the planet. Images sent back by January the following year indicated that Jupiter’s atmosphere was more turbulent than during the Pioneer flybys in 1973–1974.
Beginning on Jan. 30, 1979, Voyager 1 took a picture every 96 seconds for a span of 100 hours to generate a color time-lapse movie to depict 10 rotations of Jupiter. On Feb. 10, the spacecraft crossed into the Jovian moon system and by early March, it had already discovered a thin (less than 19 miles, or 30 kilometers, thick) ring circling Jupiter.
Voyager 1’s closest encounter with Jupiter was at 12:05 UT on March 5, 1979 at a range of about 174,000 miles (280,000 kilometers). It encountered several of Jupiter’s moons, including Amalthea, Io, Europa, Ganymede, and Callisto, returning spectacular photos of their terrain, opening up completely new worlds for planetary scientists.
The most interesting find was on Io, where images showed a bizarre yellow, orange, and brown world with at least eight active volcanoes spewing material into space, making it one of the most (if not the most) geologically active planetary body in the solar system. The presence of active volcanoes suggested that the sulfur and oxygen in Jovian space may be a result of the volcanic plumes from Io, which are rich in sulfur dioxide. The spacecraft also discovered two new moons, Thebe and Metis.
Voyager 1 at Saturn
![voyager 1 is it still working Three moons appear is small dots orbiting Saturn in this full view of the giant planet and its vast rings.](https://science.nasa.gov/wp-content/uploads/2024/04/pia01383.jpg?w=4096&format=jpeg)
Following the Jupiter encounter, Voyager 1 completed an initial course correction on April 9, 1979, in preparation for its meeting with Saturn. A second correction on Oct. 10, 1979, ensured that the spacecraft would not hit Saturn’s moon Titan.
Its flyby of the Saturn system in November 1979 was as spectacular as its previous encounter. Voyager 1 found five new moons, a ring system consisting of thousands of bands, wedge-shaped transient clouds of tiny particles in the B ring that scientists called “spokes,” a new ring (the “G-ring”), and “shepherding” satellites on either side of the F-ring—satellites that keep the rings well-defined.
During its flyby, the spacecraft photographed Saturn’s moons Titan, Mimas, Enceladus, Tethys, Dione, and Rhea. Based on incoming data, all the moons appeared to be composed largely of water ice. Perhaps the most interesting target was Titan, which Voyager 1 passed at 05:41 UT on Nov. 12 at a range of 2,500 miles (4,000 kilometers). Images showed a thick atmosphere that completely hid the surface. The spacecraft found that the moon’s atmosphere was composed of 90% nitrogen. Pressure and temperature at the surface was 1.6 atmospheres (1 atmosphere equals the average air pressure at sea level on Earth) and minus 290°F (minus 179°C), respectively.
Atmospheric data suggested that Titan might be the first body in the solar system (apart from Earth) where liquid could exist on the surface. In addition, the presence of nitrogen, methane, and more complex hydrocarbons indicated that prebiotic chemical reactions might be possible on Titan.
Voyager 1’s closest approach to Saturn was at 23:46 UT on Nov. 12, 1980, at a range of 78,000 miles (126,000 kilometers).
Voyager 1’s ‘Family Portrait’ Image
Following the encounter with Saturn, Voyager 1 headed on a trajectory escaping the solar system at a speed of about 3.5 AU per year, 35° out of the ecliptic plane to the north, in the general direction of the Sun’s motion relative to nearby stars. Because of the specific requirements for the Titan flyby, the spacecraft was not directed to Uranus and Neptune.
The final images taken by the Voyagers comprised a mosaic of 64 images taken by Voyager 1 on Feb. 14, 1990, at a distance of 40 AU, of the Sun and all the planets of the solar system (although Mercury and Mars did not appear, the former because it was too close to the Sun and the latter because Mars was on the same side of the Sun as Voyager 1 so only its dark side faced the cameras).
This was the so-called “pale blue dot” image made famous by Cornell University professor and Voyager science team member Carl Sagan (1934-1996). These were the last of a total of 67,000 images taken by the two spacecraft.
Voyager 1’s Interstellar Mission
With all the planetary encounters finally over in 1989, the missions of Voyager 1 and 2 were declared part of the Voyager Interstellar Mission (VIM), which officially began on Jan. 1, 1990.
The goal was to extend NASA’s exploration of the solar system beyond the neighborhood of the outer planets to the outer limits of the Sun’s sphere of influence, and “possibly beyond.” Specific goals include collecting data on the transition between the heliosphere, the region of space dominated by the Sun’s magnetic field and solar field, and the interstellar medium.
On Feb. 17, 1998, Voyager 1 became the most distant human-made object in existence when, at a distance of 69.4 AU from the Sun, it “overtook” Pioneer 10.
On Dec. 16, 2004, Voyager scientists announced that Voyager 1 had reported high values for the intensity for the magnetic field at a distance of 94 AU, indicating that it had reached the termination shock and had now entered the heliosheath.
The spacecraft finally exited the heliosphere and began measuring the interstellar environment on Aug. 25, 2012, the first spacecraft to do so.
On Sept. 5, 2017, NASA marked the 40th anniversary of its launch, as it continues to communicate with NASA’s Deep Space Network and send data back from four still-functioning instruments – the cosmic-ray telescope, the low-energy charged particles experiment, the magnetometer, and the plasma waves experiment.
The Golden Record
![voyager 1 is it still working The Titan/Centaur-6 launch vehicle was moved to Launch Complex 41 at NASA's Kennedy Space Center in Florida to complete checkout procedures in preparation for launch.](https://images-assets.nasa.gov/image/PIA21740/PIA21740~orig.jpg?w=2256&h=1792&fit=clip&crop=faces%2Cfocalpoint)
Each of the Voyagers contain a “message,” prepared by a team headed by Carl Sagan, in the form of a 12-inch (30-centimeter) diameter gold-plated copper disc for potential extraterrestrials who might find the spacecraft. Like the plaques on Pioneers 10 and 11, the record has inscribed symbols to show the location of Earth relative to several pulsars.
The records also contain instructions to play them using a cartridge and a needle, much like a vinyl record player. The audio on the disc includes greetings in 55 languages, 35 sounds from life on Earth (such as whale songs, laughter, etc.), 90 minutes of generally Western music including everything from Mozart and Bach to Chuck Berry and Blind Willie Johnson. It also includes 115 images of life on Earth and recorded greetings from then-U.S. President Jimmy Carter (1924– ) and then-UN Secretary-General Kurt Waldheim (1918–2007).
By January 2024, Voyager 1 was about 136 AU (15 billion miles, or 20 billion kilometers) from Earth, the farthest object created by humans, and moving at a velocity of about 38,000 mph (17.0 kilometers per second) relative to the Sun.
![voyager 1 is it still working The Voyager spacecraft against a sparkly blue background](https://science.nasa.gov/wp-content/uploads/2023/11/1-voyager-artists-concept-16.width-1320.jpg?w=4096&format=jpeg&crop=1)
National Space Science Data Center: Voyager 1
A library of technical details and historic perspective.
![voyager 1 is it still working Colorful book cover for Beyond Earth: A Chronicle of Deep Space Exploration. It features spacecraft cutouts against a bright primary colors.](https://science.nasa.gov/wp-content/uploads/2023/09/beyondearth_cover.png?w=4096&format=png&crop=1)
Beyond Earth: A Chronicle of Deep Space Exploration
A comprehensive history of missions sent to explore beyond Earth.
Discover More Topics From NASA
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Our Solar System
![voyager 1 is it still working An illustration of a slice of a bright orange sun, with planets, a comet and asteroids against a blue-black backround.](https://science.nasa.gov/wp-content/uploads/2023/06/solar-system-illustration-16x9-1.jpg?w=4096&format=jpeg)
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NASA Engineers Are Racing to Fix Voyager 1
![voyager 1 is it still working Voyager model](https://media.wired.com/photos/65c40998db9a8c41e57af82b/master/w_2560%2Cc_limit/Voyager-ars-science-GettyImages-164430702.jpg)
Voyager 1 is still alive out there , barreling into the cosmos more than 15 billion miles away. However, a computer problem has kept the mission's loyal support team in Southern California from knowing much more about the status of one of NASA's longest-lived spacecraft.
The computer glitch cropped up on November 14, and it affected Voyager 1's ability to send back telemetry data, such as measurements from the craft's science instruments or basic engineering information about how the probe was doing. As a result, the team has no insight into key parameters regarding the craft's propulsion, power, or control systems.
"It would be the biggest miracle if we get it back. We certainly haven't given up," said Suzanne Dodd, Voyager project manager at NASA's Jet Propulsion Laboratory, in an interview with Ars. "There are other things we can try. But this is, by far, the most serious since I’ve been project manager."
Dodd became the project manager for NASA's Voyager mission in 2010, overseeing a small cadre of engineers responsible for humanity's exploration into interstellar space. Voyager 1 is the most distant spacecraft ever, speeding away from the sun at 38,000 mph (17 kilometers per second).
Voyager 2, which launched 16 days before Voyager 1 in 1977, isn't quite as far away. It took a more leisurely route through the solar system, flying past Jupiter, Saturn, Uranus, and Neptune, while Voyager 1 picked up speed during an encounter with Saturn to overtake its sister spacecraft.
For the past couple of decades, NASA has devoted Voyager's instruments to studying cosmic rays, the magnetic field, and the plasma environment in interstellar space. They're not taking pictures anymore. Both probes have traveled beyond the heliopause, where the flow of particles emanating from the sun runs into the interstellar medium.
There are no other operational spacecraft currently exploring interstellar space. NASA's New Horizons probe, which flew past Pluto in 2015, is on track to reach interstellar space in the 2040s.
The latest problem with Voyager 1 lies in the probe's Flight Data Subsystem (FDS), one of three computers on the spacecraft working alongside a command-and-control central computer and another device overseeing attitude control and pointing.
The FDS is responsible for collecting science and engineering data from the spacecraft's network of sensors and then combining the information into a single data package in binary code—a series of 1s and 0s. A separate component called the Telemetry Modulation Unit actually sends the data package back to Earth through Voyager's 12-foot (3.7-meter) dish antenna.
In November, the data packages transmitted by Voyager 1 manifested a repeating pattern of 1s and 0s as if it were stuck, according to NASA. Dodd said engineers at JPL have spent the better part of three months trying to diagnose the cause of the problem. She said the engineering team is "99.9 percent sure" the problem originated in the FDS, which appears to be having trouble "frame syncing" data.
So far, the ground team believes the most likely explanation for the problem is a bit of corrupted memory in the FDS. However, because of the computer hangup, engineers lack detailed data from Voyager 1 that might lead them to the root of the issue. "It's likely somewhere in the FDS memory," Dodd said. "A bit got flipped or corrupted. But without the telemetry, we can't see where that FDS memory corruption is."
When it was developed five decades ago, Voyager's Flight Data Subsystem was an innovation in computing. It was the first computer on a spacecraft to make use of volatile memory. Each Voyager spacecraft launched with two FDS computers, but Voyager 1's backup FDS failed in 1981, according to Dodd.
The only signal Voyager 1's Earthbound engineers have received since November is a carrier tone, which basically tells the team the spacecraft is still alive. There's no indication of any other major problems. Changes in the carrier signal's modulation indicate Voyager 1 is receiving commands uplinked from Earth.
"Unfortunately, we haven't cracked the nut yet, or solved the problem, or gotten any telemetry back," Dodd said.
In the next few weeks, Voyager's ground team plans to transmit commands for Voyager 1 to try to isolate where the suspected corrupted memory lies within the FDS computer. One of the ideas involves switching the computer to operate in different modes, such as the operating parameters the FDS used when Voyager 1 was flying by Jupiter and Saturn in 1979 and 1980. The hope among Voyager engineers is that the transition to different data modes might reveal what part of the FDS memory needs a correction.
This is a lot more complicated than it might seem on the surface. For one thing, the data modes engineers might command Voyager 1 into haven't been used for 40 years or more. Nobody has thought about doing this with Voyager's flight data computer for decades.
Voyager 1 and 2 have an outsized public profile compared to the resources NASA commits to keeping the spacecraft going. Fewer than a dozen people typically work on the Voyager mission. This number has slightly increased since the computer problem appeared in November, with a small "tiger team" of around eight experts in flight data systems, software, and spacecraft communications assigned to help troubleshoot the glitch.
"Not to be morose, but a lot of Voyager people are dead," Dodd said. "So the people that built the spacecraft are not alive anymore. We do have a reasonably good set of documentation, but a lot of it is in paper, so you do this archaeology dig to get documents."
Imagine rummaging through a user's manual for an antique car. The book's weathered pages are probably fraying. That's not unlike what Voyager engineers, some of whom weren't alive when the mission launched, are experiencing now.
"We have sheets and sheets of schematics that are paper, that are all yellowed on the corners, and all signed in 1974," Dodd said. "They’re pinned up on the walls, and people are looking at them. That's a whole story in itself, just how to get to the information you need to be able to talk about the commanding decisions or what the problem might be."
This is a familiar task for Voyager engineers. In the last few years, the mission's core team at JPL has consulted archived documents to troubleshoot other, less serious computer problems and develop a new way to operate thrusters on both spacecraft to stave off the accumulation of residue in fuel lines.
While spacecraft engineers love redundancy, they no longer have the luxury of backups on the Voyagers. That means, in any particular section of the spacecraft, a failure of a single part could bring the mission to a halt. Both spacecraft run off nuclear batteries, which produce a little less electricity each year as their plutonium power sources decay. Toward the end of the 2020s, the declining power will force NASA to start turning off instruments on each spacecraft.
Most of NASA's modern missions exploring the solar system have simulators on the ground to test commands and procedures before sending them to the real spacecraft. This practice can reveal commanding errors that could put a mission at risk.
“It is difficult to command Voyager," Dodd said. "We don't have any type of simulator for this. We don't have any hardware simulator. We don't have any software simulator. There's no simulator with the FDS, no hardware where we can try it on the ground first before we send it. So that makes people more cautious, and it's a balance between getting commanding right and taking risks."
Managers are also aware of Voyager 1's age. It's operating on borrowed time. "So we don't want to spend forever deciding what we want to do," Dodd said. "Something else might fail. The thrusters might fail. We want to do the right thing, but we can't hem and haw over what the right thing is. We need to look at things methodically and logically, make a decision, and go for it."
When it comes time to send up more commands to try to save Voyager 1, operators at JPL will have to wait more than 45 hours to get a response. The spacecraft's vast distance and position in the southern sky require NASA to use the largest 230-foot (70-meter) antenna at a Deep Space Network tracking site in Australia, one of the network's most in-demand antennas .
"The data rates are very low, and this anomaly causes us not to have any telemetry," Dodd said. "We're kind of shooting in the blind a little bit because we don't know what the status of the spacecraft is completely."
This story originally appeared on Ars Technica .
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Hope returns —
Nasa knows what knocked voyager 1 offline, but it will take a while to fix, "engineers are optimistic they can find a way for the fds to operate normally.".
Stephen Clark - Apr 6, 2024 12:28 am UTC
![voyager 1 is it still working A Voyager space probe in a clean room at the Jet Propulsion Laboratory in 1977.](https://cdn.arstechnica.net/wp-content/uploads/2024/04/GettyImages-164430717-800x1010.jpg)
Engineers have determined why NASA's Voyager 1 probe has been transmitting gibberish for nearly five months, raising hopes of recovering humanity's most distant spacecraft.
Voyager 1, traveling outbound some 15 billion miles (24 billion km) from Earth, started beaming unreadable data down to ground controllers on November 14. For nearly four months, NASA knew Voyager 1 was still alive—it continued to broadcast a steady signal—but could not decipher anything it was saying.
Confirming their hypothesis, engineers at NASA's Jet Propulsion Laboratory (JPL) in California confirmed a small portion of corrupted memory caused the problem. The faulty memory bank is located in Voyager 1's Flight Data System (FDS), one of three computers on the spacecraft. The FDS operates alongside a command-and-control central computer and another device overseeing attitude control and pointing.
The FDS duties include packaging Voyager 1's science and engineering data for relay to Earth through the craft's Telemetry Modulation Unit and radio transmitter. According to NASA, about 3 percent of the FDS memory has been corrupted, preventing the computer from carrying out normal operations.
Optimism growing
Suzanne Dodd, NASA's project manager for the twin Voyager probes, told Ars in February that this was one of the most serious problems the mission has ever faced. That is saying something because Voyager 1 and 2 are NASA's longest-lived spacecraft. They launched 16 days apart in 1977, and after flying by Jupiter and Saturn, Voyager 1 is flying farther from Earth than any spacecraft in history. Voyager 2 is trailing Voyager 1 by about 2.5 billion miles, although the probes are heading out of the Solar System in different directions.
Normally, engineers would try to diagnose a spacecraft malfunction by analyzing data it sent back to Earth. They couldn't do that in this case because Voyager 1 has been transmitting data packages manifesting a repeating pattern of ones and zeros. Still, Voyager 1's ground team identified the FDS as the likely source of the problem.
The Flight Data Subsystem was an innovation in computing when it was developed five decades ago. It was the first computer on a spacecraft to use volatile memory. Most of NASA's missions operate with redundancy, so each Voyager spacecraft launched with two FDS computers. But the backup FDS on Voyager 1 failed in 1982.
Due to the Voyagers' age, engineers had to reference paper documents, memos, and blueprints to help understand the spacecraft's design details. After months of brainstorming and planning, teams at JPL uplinked a command in early March to prompt the spacecraft to send back a readout of the FDS memory.
The command worked, and Voyager1 responded with a signal different from the code it had been transmitting since November. After several weeks of meticulous examination of the new code, engineers pinpointed the location of the bad memory.
"The team suspects that a single chip responsible for storing part of the affected portion of the FDS memory isn’t working," NASA said in an update posted Thursday. "Engineers can’t determine with certainty what caused the issue. Two possibilities are that the chip could have been hit by an energetic particle from space or that it simply may have worn out after 46 years."
Voyager 1's distance from Earth complicates the troubleshooting effort. The one-way travel time for a radio signal to reach Voyager 1 from Earth is about 22.5 hours, meaning it takes roughly 45 hours for engineers on the ground to learn how the spacecraft responded to their commands.
NASA also must use its largest communications antennas to contact Voyager 1. These 230-foot-diameter (70-meter) antennas are in high demand by many other NASA spacecraft , so the Voyager team has to compete with other missions to secure time for troubleshooting. This means it will take time to get Voyager 1 back to normal operations.
"Although it may take weeks or months, engineers are optimistic they can find a way for the FDS to operate normally without the unusable memory hardware, which would enable Voyager 1 to begin returning science and engineering data again," NASA said.
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July 1, 2022
21 min read
Record-Breaking Voyager Spacecraft Begin to Power Down
The pioneering probes are still running after nearly 45 years in space, but they will soon lose some of their instruments
By Tim Folger
![voyager 1 is it still working](https://static.scientificamerican.com/sciam/cache/file/2643E4EE-F0DA-41D8-989CE01C05C0690B_source.jpg?w=600)
NASA/JPL-Caltech
I f the stars hadn't aligned, two of the most remarkable spacecraft ever launched never would have gotten off the ground. In this case, the stars were actually planets—the four largest in the solar system. Some 60 years ago they were slowly wheeling into an array that had last occurred during the presidency of Thomas Jefferson in the early years of the 19th century. For a while the rare planetary set piece unfolded largely unnoticed. The first person to call attention to it was an aeronautics doctoral student at the California Institute of Technology named Gary Flandro.
It was 1965, and the era of space exploration was barely underway—the Soviet Union had launched Sputnik 1, the first artificial satellite, only eight years earlier. Flandro, who was working part-time at NASA's Jet Propulsion Laboratory in Pasadena, Calif., had been tasked with finding the most efficient way to send a space probe to Jupiter or perhaps even out to Saturn, Uranus or Neptune. Using a favorite precision tool of 20th-century engineers—a pencil—he charted the orbital paths of those giant planets and discovered something intriguing: in the late 1970s and early 1980s, all four would be strung like pearls on a celestial necklace in a long arc with Earth.
This coincidence meant that a space vehicle could get a speed boost from the gravitational pull of each giant planet it passed, as if being tugged along by an invisible cord that snapped at the last second, flinging the probe on its way. Flandro calculated that the repeated gravity assists, as they are called, would cut the flight time between Earth and Neptune from 30 years to 12. There was just one catch: the alignment happened only once every 176 years. To reach the planets while the lineup lasted, a spacecraft would have to be launched by the mid-1970s.
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READY FOR LAUNCH: Voyager 2 undergoes testing at NASA’s Jet Propulsion Laboratory before its flight ( left ). The spacecraft lifted off on August 20, 1977. Credit: NASA/JPL-Caltech
As it turned out, NASA would build two space vehicles to take advantage of that once-in-more-than-a-lifetime opportunity. Voyager 1 and Voyager 2, identical in every detail, were launched within 15 days of each other in the summer of 1977. After nearly 45 years in space, they are still functioning, sending data back to Earth every day from beyond the solar system's most distant known planets. They have traveled farther and lasted longer than any other spacecraft in history. And they have crossed into interstellar space, according to our best understanding of the boundary between the sun's sphere of influence and the rest of the galaxy. They are the first human-made objects to do so, a distinction they will hold for at least another few decades. Not a bad record, all in all, considering that the Voyager missions were originally planned to last just four years.
Early in their travels, four decades ago, the Voyagers gave astonished researchers the first close-up views of the moons of Jupiter and Saturn, revealing the existence of active volcanoes and fissured ice fields on worlds astronomers had thought would be as inert and crater-pocked as our own moon. In 1986 Voyager 2 became the first spacecraft to fly past Uranus; three years later it passed Neptune. So far it is the only spacecraft to have made such journeys. Now, as pioneering interstellar probes more than 12 billion miles from Earth, they're simultaneously delighting and confounding theorists with a series of unexpected discoveries about that uncharted region.
Their remarkable odyssey is finally winding down. Over the past three years NASA has shut down heaters and other nonessential components, eking out the spacecrafts' remaining energy stores to extend their unprecedented journeys to about 2030. For the Voyagers' scientists, many of whom have worked on the mission since its inception, it is a bittersweet time. They are now confronting the end of a project that far exceeded all their expectations.*
“We're at 44 and a half years,” says Ralph McNutt, a physicist at the Johns Hopkins University Applied Physics Laboratory (APL), who has devoted much of his career to the Voyagers. “So we've done 10 times the warranty on the darn things.”
The stars may have been cooperating, but at first, Congress wasn't. After Flandro's report, NASA drew up plans for a so-called Grand Tour that would send as many as five probes to the four giant planets and Pluto. It was ambitious. It was expensive. Congress turned it down. “There was this really grand vision,” says Linda Spilker, a JPL planetary scientist who started working on the Voyager missions in 1977, a few months before their launch. “Because of cost, it was whittled back.”
Congress eventually approved a scaled-down version of the Grand Tour, initially called Mariner Jupiter-Saturn 1977, or MJS 77. Two spacecraft were to be sent to just two planets. Nevertheless, NASA's engineers went about designing, somewhat surreptitiously, vehicles capable of withstanding the rigors of a much longer mission. They hoped that once the twin probes proved themselves, their itinerary would be extended to Uranus, Neptune, and beyond.
“Four years—that was the prime mission,” says Suzanne Dodd, who, after a 20-year hiatus from the Voyager team, returned in 2010 as the project manager. “But if an engineer had a choice to put in a part that was 10 percent more expensive but wasn't something that was needed for a four-year mission, they just went ahead and did that. And they wouldn't necessarily tell management.” The fact that the scientists were able to build two spacecraft, and that both are still working, is even more remarkable, she adds.
In terms of both engineering and deep-space navigation, this was new territory. The motto “Failure is not an option” hadn't yet been coined, and at that time it would not have been apt. In the early 1960s NASA had attempted to send a series of spacecraft to the moon to survey future landing sites for crewed missions. After 12 failures, one such effort finally succeeded.
![voyager 1 is it still working](https://static.scientificamerican.com/sciam/cache/file/615F8921-6802-45C8-AB87EF0DC463E144_source.jpg?&w=900)
GOLDEN RECORD: Each Voyager carries a golden record ( left ) of sounds and images from Earth in case the spacecraft are intercepted by an extraterrestrial civilization. Engineers put the cap on Voyager 1’s record before its launch ( right ). Credit: NASA/JPL-Caltech
“In those days we always launched two spacecraft” because the failure rate was so high, said Donald Gurnett, only partly in jest. Gurnett, a physicist at the University of Iowa and one of the original scientists on the Voyager team, was a veteran of 40 other space missions. He spoke with me a few weeks before his death in January. (In an obituary, his daughter Christina said his only regret was that “he would not be around to see the next 10 years of data returning from Voyager.”)
When the Voyagers were being built, only one spacecraft had used a gravity assist to reach another planet—the Mariner 10 probe got one from Venus while en route to Mercury. But the Voyagers would be attempting multiple assists with margins of error measured in tens of minutes. Jupiter, their first stop, was about 10 times farther from Earth than Mercury. Moreover, the Voyagers would have to travel through the asteroid belt along the way. Before Voyager there had been a big debate about whether spacecraft could get through the asteroid belt “without being torn to pieces,” McNutt says. But in the early 1970s Pioneer 10 and 11 flew through it unscathed—the belt turned out to be mostly empty space—paving the way for Voyager, he says.
To handle all these challenges, the Voyagers, each about the size of an old Volkswagen Beetle, needed some onboard intelligence. So NASA's engineers equipped the vehicles' computers with 69 kilobytes of memory, less than a hundred thousandth the capacity of a typical smartphone. In fact, the smartphone comparison is not quite right. “The Voyager computers have less memory than the key fob that opens your car door,” Spilker says. All the data collected by the spacecraft instruments would be stored on eight-track tape recorders and then sent back to Earth by a 23-watt transmitter—about the power level of a refrigerator light bulb. To compensate for the weak transmitter, both Voyagers carry 12-foot-wide dish antennas to send and receive signals.
“It felt then like we were right on top of the technology,” says Alan Cummings, a physicist at Caltech and another Voyager OG. “I'll tell you, what was amazing is how quickly that whole thing happened.” Within four years the MJS 77 team had built three spacecraft, including one full-scale functioning test model. The spacecraft were rechristened Voyager 1 and 2 a few months before launch.
Although many scientists have worked on the Voyagers over the decades, Cummings can make a unique claim. “I was the last person to touch the spacecraft before they launched,” he says. Cummings was responsible for two detectors designed to measure the flux of electrons and other charged particles when the Voyagers encountered the giant planets. Particles would pass through a small “window” in each detector that consisted of aluminum foil just three microns thick. Cummings worried that technicians working on the spacecraft might have accidentally dented or poked holes in the windows. “So they needed to be inspected right before launch,” he says. “Indeed, I found that one of them was a little bit loose.”
![voyager 1 is it still working](https://static.scientificamerican.com/sciam/assets/Image/saw0722Folg31_d.png?w=900)
Credit: Graphic by Matthew Twombly and Juan Velasco (5W Infographic); Consultants: John Richardson (principal investigator, Voyager Plasma Science, Massachusetts Institute of Technology, Center for Space Research) and Merav Opher (professor, Department of Astronomy, Boston University)
Voyager 1 reached Jupiter in March 1979, 546 days after its launch. Voyager 2, following a different trajectory, arrived in July of that year. Both spacecraft were designed to be stable platforms for their vidicon cameras, which used red, green and blue filters to produce full-color images. They hardly spin at all as they speed through space—their rotational motion is more than 15 times slower than the crawl of a clock's hour hand, minimizing the risk of blurred images. Standing-room crowds at JPL watched as the spacecraft started transmitting the first pictures of Jupiter while still about three or four months away from the planet.
“In all of the main conference rooms and in the hallways, they had these TV monitors set up,” Spilker says. “So as the data came down line by line, each picture would appear on a monitor. The growing anticipation and the expectation of what we were going to see when we got up really, really close—that was tremendously exciting.”
Cummings vividly recalls the day he caught his first glimpse of Jupiter's third-largest moon, Io. “I was going over to a building on the Caltech campus where they were showing a livestream [of Voyager's images],” he says. “I walk in, and there's this big picture of Io, and it's all orange and black. I thought, okay, the Caltech students had pulled a prank, and it's a picture of a poorly made pizza.”
Io's colorful appearance was completely unexpected. Before the Voyagers proved otherwise, the assumption had been that all moons in the solar system would be more or less alike—drab and cratered. No one anticipated the wild diversity of moonscapes the Voyagers would discover around Jupiter and Saturn.
The first hint that there might be more kinds of moons in the heavens than astronomers had dreamed of came while the Voyagers were still about a million miles from Jupiter. One of their instruments—the Low-Energy Charged Particle [LECP] detector system—picked up some unusual signals. “We started seeing oxygen and sulfur ions hitting the detector,” says Stamatios Krimigis, who designed the LECP and is now emeritus head of the space department at Johns Hopkins APL. The density of oxygen and sulfur ions had shot up by three orders of magnitude compared with the levels measured up to that point. At first, his team thought the instrument had malfunctioned. “We scrutinized the data,” Krimigis says, “but there was nothing wrong.”
The Voyagers' cameras soon solved the mystery: Io had active volcanoes. The small world—it is slightly larger than Earth's moon—is now known to be the most volcanically active body in the solar system. “The only active volcanoes we knew of at the time were on Earth,” says Edward Stone, who has been the project scientist for the Voyager missions since 1972. “And here suddenly was a moon that had 10 times as much volcanic activity as Earth.” Io's colors—and the anomalous ions hitting Krimigis's detector—came from elements blasted from the moon's volcanoes. The largest of Io's volcanoes, known as Pele, has blown out plumes 30 times the height of Mount Everest; debris from Pele covers an area about the size of France.
![voyager 1 is it still working](https://static.scientificamerican.com/sciam/cache/file/A72794A6-8711-44AE-9FC7ADC729259943_source.jpg?&w=900)
The twin spacecraft took a grand tour through the giant planets of the solar system, passing by Jupiter ( 1 , 2 ) and Saturn ( 5 , 6 ) and taking the first close-up views of those planets’ moons. Jupiter’s satellite Europa ( 3 ), for instance, turned out to be covered with ice, and its moon Io ( 4 ) was littered with volcanoes—discoveries that came as a surprise to scientists who had assumed the moons would be gray and crater-pocked like Earth’s. Voyager 2 went on to fly by Uranus ( 7 ) and Neptune ( 8 ), and it is still the only probe to have visited there. Credit: NASA/JPL ( 1 , 2 , 4 , 5 , 6 , 8 ); NASA/JPL/USGS (3); NASA/JPL-Caltech ( 7 )
Altogether, the Voyagers took more than 33,000 photographs of Jupiter and its satellites. It felt like every image brought a new discovery: Jupiter had rings; Europa, one of Jupiter's 53 named moons, was covered with a cracked icy crust now estimated to be more than 60 miles thick. As the spacecraft left the Jupiter system, they got a farewell kick of 35,700 miles per hour from a gravity assist. Without it they would not have been able to overcome the gravitational pull of the sun and reach interstellar space.
At Saturn, the Voyagers parted company. Voyager 1 hurtled through Saturn's rings (taking thousands of hits from dust grains), flew past Titan, a moon shrouded in orange smog, and then headed “north” out of the plane of the planets. Voyager 2 continued alone to Uranus and Neptune. In 1986 Voyager 2 found 10 new moons around Uranus and added the planet to the growing list of ringed worlds. Just four days after Voyager 2's closest approach to Uranus, however, its discoveries were overshadowed when the space shuttle Challenger exploded shortly after launch. All seven of Challenger 's crew members were killed, including Christa McAuliffe, a high school teacher from New Hampshire who would have been the first civilian to travel into space.
Three years later, passing about 2,980 miles above Neptune's azure methane atmosphere, Voyager 2 measured the highest wind speeds of any planet in the solar system: up to 1,000 mph. Neptune's largest moon, Triton, was found to be one of the coldest places in the solar system, with a surface temperature of −391 degrees Fahrenheit (−235 degrees Celsius). Ice volcanoes on the moon spewed nitrogen gas and powdery particles five miles into its atmosphere.
Voyager 2's images of Neptune and its moons would have been the last taken by either of the spacecraft had it not been for astronomer Carl Sagan, who was a member of the mission's imaging team. With the Grand Tour officially completed, NASA planned to turn off the cameras on both probes. Although the mission had been extended with the hope that the Voyagers would make it to interstellar space—it had been officially renamed the Voyager Interstellar Mission—there would be no photo ops after Neptune, only the endless void and impossibly distant stars.
![voyager 1 is it still working](https://static.scientificamerican.com/sciam/cache/file/24EC64A7-47F0-4076-B58C7FC1417834D5_source.jpg?&w=900)
ERUPTION: The discovery of the volcano Pele, shown in this photograph from Voyager 1, confirmed that Jupiter’s moon hosts active volcanism. Credit: NASA/JPL/USGS
Sagan urged NASA officials to have Voyager 1 transmit one last series of images. So, on Valentine's Day in 1990, the probe aimed its cameras back toward the inner solar system and took 60 final shots. The most haunting of them all, made famous by Sagan as the “Pale Blue Dot,” captured Earth from a distance of 3.8 billion miles. It remains the most distant portrait of our planet ever taken. Veiled by wan sunlight that reflected off the camera's optics, Earth is barely visible in the image. It doesn't occupy even a full pixel.
Sagan, who died in 1996, “worked really hard to convince NASA that it was worth looking back at ourselves,” Spilker says, “and seeing just how tiny that pale blue dot was.”
Both Voyagers are now so far from Earth that a one-way radio signal traveling at the speed of light takes almost 22 hours to reach Voyager 1 and just over 18 to catch up with Voyager 2. Every day they move away by another three to four light-seconds. Their only link to Earth is NASA's Deep Space Network, a trio of tracking complexes spaced around the globe that enables uninterrupted communication with spacecraft as Earth rotates. As the Voyagers recede from us in space and time, their signals are becoming ever fainter. “Earth is a noisy place,” says Glen Nagle, outreach and communications manager at the Deep Space Network's facility in Canberra, Australia. “Radios, televisions, cell phones—everything makes noise. And so it gets harder and harder to hear these tiny whispers from the spacecraft.”
Faint as they are, those whispers have upended astronomers' expectations of what the Voyagers would find as they entered the interstellar phase of the mission. Stone and other Voyager scientists I spoke with cautioned me not to conflate the boundary of interstellar space with that of the solar system. The solar system includes the distant Oort cloud, a spherical collection of cometlike bodies bound by the sun's gravity that may stretch halfway to the closest star. The Voyagers won't reach its near edge for at least another 300 years. But interstellar space lies much closer at hand. It begins where a phenomenon called the solar wind ends.
Like all stars, the sun emits a constant flow of charged particles and magnetic fields—the solar wind. Moving at hypersonic speeds, the wind blows out from the sun like an inflating balloon, forming what astronomers call the heliosphere. As the solar wind billows into space, it pulls the sun's magnetic field along for the ride. Eventually pressure from interstellar matter checks the heliosphere's expansion, creating a boundary—preceded by an enormous shock front, the “termination shock”—with interstellar space. Before the Voyagers' journeys, estimates of the distance to that boundary with interstellar space, known as the heliopause, varied wildly.
“Frankly, some of them were just guesses,” according to Gurnett. One early guesstimate located the heliopause as close as Jupiter. Gurnett's own calculations, made in 1993, set the distance at anywhere from 116 to 177 astronomical units, or AU—about 25 times more distant. (One AU is the distance between Earth and the sun, equal to 93 million miles.) Those numbers, he says, were not very popular with his colleagues. By 1993 Voyager 1 already had 50 AU on its odometer. “If [the heliopause] was at 120 AU, that meant we had another 70 AU to go.” If Gurnett was right, the Voyagers, clipping along at about 3.5 AU a year, wouldn't exit the heliosphere for at least another two decades.
That prediction raised troubling questions: would the Voyagers—or the support of Congress—last that long? The mission's funding had been extended on the expectation that the spacecraft would cross the heliopause at about 50 AU. But the spacecraft left that milestone behind without finding any of the anticipated signs of interstellar transit. Astronomers had expected the Voyagers to detect a sudden surge in galactic cosmic rays—high-energy particles sprayed like shrapnel at nearly the speed of light from supernovae and other deep-space cataclysms. The vast magnetic cocoon formed by the heliosphere deflects most low-energy cosmic rays before they can reach the inner solar system. “[It] shields us from at least 75 percent of what's out there,” Stone says.
The Voyager ground team was also waiting for the spacecraft to register a shift in the prevailing magnetic field. The interstellar magnetic field, thought to be generated by nearby stars and vast clouds of ionized gases, would presumably have a different orientation from the magnetic field of the heliosphere. But the Voyagers had detected no such change.
![voyager 1 is it still working](https://static.scientificamerican.com/sciam/assets/Image/saw0722Folg33_d.png?w=900)
Gurnett's 1993 estimates were prescient. Almost 20 years passed before one of the Voyagers finally made it to the heliopause. During that time the mission narrowly survived threats to its funding, and the Voyager team shrank from hundreds of scientists and engineers to a few dozen close-knit lifers. Most of them remain on the job today. “When you have such a long-lived mission, you start to regard people like family,” Spilker says. “We had our kids around the same time. We'd take vacations together. We're spanning multiple generations now, and some of the younger people on Voyager were not even born [when the spacecraft] launched.”
The tenacity and commitment of that band of brothers and sisters were rewarded on August 25, 2012, when Voyager 1 finally crossed the heliopause. But some of the data it returned were baffling. “We delayed announcing that we had reached interstellar space because we couldn't come to an agreement on the fact,” Cummings says. “There was lots of debate for about a year.”
Although Voyager 1 had indeed found the expected jump in plasma density—its plasma-wave detector, an instrument designed by Gurnett, inferred an 80-fold increase—there was no sign of a change in the direction of the ambient magnetic field. If the vehicle had crossed from an area permeated by the sun's magnetic field to a region where the magnetic field derived from other stars, shouldn't that switch have been noticeable? “That was a shocker,” Cummings says. “And that still bothers me. But a lot of people are coming to grips with it.”
When Voyager 2 reached the interstellar shoreline in November 2018, it, too, failed to detect a magnetic field shift. And the spacecraft added yet another puzzle: it encountered the heliopause at 120 AU from Earth—the same distance marked by its twin six years earlier. That did not jibe with any theoretical models, all of which said the heliosphere should expand and contract in sync with the sun's 11-year cycle. During that period the solar wind ebbs and surges. Voyager 2 arrived when the solar wind was peaking, which, if the models were correct, should have pushed the heliopause farther out than 120 AU. “It was unexpected by all the theorists,” Krimigis says. “I think the modeling, in terms of the findings of the Voyagers, has been found wanting.”
Now that the Voyagers are giving theorists some real field data, their models of the interaction between the heliosphere and the interstellar environment are becoming more complex. “The sort of general picture is that [our sun] emerged from a hot, ionized region” and entered a spotty, partly ionized area in the galaxy, says Gary Zank, an astrophysicist at the University of Alabama in Huntsville. The hot region likely formed in the aftermath of a supernova—some nearby ancient star, or perhaps a few, exploded at the end of its life and heated up the space, stripping electrons off their atoms in the process. The boundary around that region can be thought of as “kind of like the seashore, with all the water and the waves swirling and mixed up. We're in that kind of turbulent region ... magnetic fields get twisted up, turned around. It's not like the smooth magnetic fields that theorists usually like to draw,” although the amount of turbulence seen can differ depending on the type of observation. The Voyagers' data show little field variation at large scales but many small-scale fluctuations around the heliopause, caused by the heliosphere's influence on the interstellar medium. At some point, it is thought, the spacecraft will leave those roiling shoals behind and at last encounter the unalloyed interstellar magnetic field.
Or maybe that picture is completely wrong. A few researchers believe that the Voyagers have not yet left the heliosphere. “There is no reason for the magnetic fields in the heliosphere and the interstellar medium to have exactly the same orientation,” says Len A. Fisk, a space plasma scientist at the University of Michigan and a former NASA administrator. For the past several years Fisk and George Gloeckler, a colleague at Michigan and a longtime Voyager mission scientist, have been working on a model of the heliosphere that pushes its edge out by another 40 AU.
Most people working in the field, however, have been convinced by the dramatic uptick in galactic cosmic rays and plasma density the Voyagers measured. “Given that,” Cummings says, “it's very difficult to argue that we're not really in interstellar space. But then again, it's not like everything fits. That's why we need an interstellar probe.”
McNutt has been pushing for such a mission for decades. He and his colleagues at Johns Hopkins recently completed a nearly 500-page report outlining plans for an interstellar probe that would launch in 2036 and potentially could reach the heliosphere within 15 years, shaving 20 years off Voyager 1's flight time. And unlike the Voyager missions, the interstellar probe would be designed specifically to study the outer edge of the heliosphere and its environs. Within the next two years the National Academies of Sciences, Engineering, and Medicine will decide whether the mission should be one of NASA's priorities for the next decade.
An interstellar probe could answer one of the most fundamental questions about the heliosphere. “If I'm looking from the outside, what the devil does this structure look like?” McNutt asks. “We really don't know. It's like trying to understand what a goldfish bowl looks like from the point of view of the goldfish. We [need to] be able to see the bowl from the outside.” In some models, as the heliosphere cruises along at 450,000 mph, interstellar matter flows smoothly past it, like water around the bow of a ship, resulting in an overall cometlike shape. One recent computer model, developed by astronomer Merav Opher and her colleagues at Boston University, predicts that more turbulent dynamics give the heliosphere a shape like a cosmic croissant.
“You can start multiple fights at any good science conference about that,” McNutt says, “but it's going to take getting out there and actually making some measurements to be able to see what's going on. It would be nice to know what the neighborhood looks like.”
Some things outlive their purpose—answering machines, VCRs, pennies. Not the Voyagers—they transcended theirs, using 50-year-old technology. “The amount of software on these instruments is slim to none,” Krimigis says. “There are no microprocessors—they didn't exist!” The Voyagers' designers could not rely on thousands of lines of code to help operate the spacecraft. “On the whole,” Krimigis says, “I think the mission lasted so long because almost everything was hardwired. Today's engineers don't know how to do this. I don't know if it's even possible to build such a simple spacecraft [now]. Voyager is the last of its kind.”
It won't be easy to say goodbye to these trailblazing vehicles. “It's hard to see it come to an end,” Cummings says. “But we did achieve something really amazing. It could have been that we never got to the heliopause, but we did.”
Voyager 2 now has five remaining functioning instruments, and Voyager 1 has four. All are powered by a device that converts heat from the radioactive decay of plutonium into electricity. But with the power output decreasing by about four watts a year, NASA has been forced into triage mode. Two years ago the mission's engineers turned off the heater for the cosmic-ray detector, which had been crucial in determining the heliopause transit. Everyone expected the instrument to die.
“The temperature dropped like 60 or 70 degrees C, well outside any tested operating limits,” Spilker says, “and the instrument kept working. It was incredible.”
The last two Voyager instruments to turn off will probably be a magnetometer and the plasma science instrument. They are contained in the body of the spacecraft, where they are warmed by heat emitted from computers. The other instruments are suspended on a 43-foot-long fiberglass boom. “And so when you turn the heaters off,” Dodd says, “those instruments get very, very cold.”
How much longer might the Voyagers last? “If everything goes really well, maybe we can get the missions extended into the 2030s,” Spilker says. “It just depends on the power. That's the limiting point.”
![voyager 1 is it still working](https://static.scientificamerican.com/sciam/cache/file/C11D5C6C-3292-4AB8-A5B1AC8DF82A150C_source.jpg?&w=900)
TINY SPECK: Among Voyager 1’s last photographs was this shot of Earth seen from 3.8 billion miles away, dubbed the “Pale Blue Dot” by Voyager scientist Carl Sagan. Credit: NASA/JPL-Caltech
Even after the Voyagers are completely muted, their journeys will continue. In another 16,700 years, Voyager 1 will pass our nearest neighboring star, Proxima Centauri, followed 3,600 years later by Voyager 2. Then they will continue to circle the galaxy for millions of years. They will still be out there, more or less intact, eons after our sun has collapsed and the heliosphere is no more, not to mention one Pale Blue Dot. At some point in their travels, they may manage to convey a final message. It won't be transmitted by radio, and if it's received, the recipients won't be human.
The message is carried on another kind of vintage technology: two records. Not your standard plastic version, though. These are made of copper, coated with gold and sealed in an aluminum cover. Encoded in the grooves of the Golden Records , as they are called, are images and sounds meant to give some sense of the world the Voyagers came from. There are pictures of children, dolphins, dancers and sunsets; the sounds of crickets, falling rain and a mother kissing her child; and 90 minutes of music, including Bach's Brandenburg Concerto No. 2 and Chuck Berry's “Johnny B. Goode.”
And there is a message from Jimmy Carter, who was the U.S. president when the Voyagers were launched. “We cast this message into the cosmos,” it reads in part. “We hope someday, having solved the problems we face, to join a community of galactic civilizations. This record represents our hope and our determination, and our good will in a vast and awesome universe.”
*Editor’ Note (6/22/22): This paragraph was edited after posting to correct the description of when NASA began shutting down nonessential components of the Voyager spacecraft.
Tim Folger is a freelance journalist who writes for National Geographic , Discover , and other national publications.
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Mortgage rates tick up but remain at one-year lows
The average rates for both 30- and 15-year fixed-rate mortgage rose slightly this week.
![voyager 1 is it still working NAHB CEO Jim Tobin discusses changes in the real estate business as new rules are set to take place for realtors and the impact of markets on the industry.](https://cf-images.us-east-1.prod.boltdns.net/v1/static/854081161001/a7aef650-36c2-436c-a254-d73bceb1d133/c1686f99-031a-43a9-b6e2-f321fbdbe747/1280x720/match/image.jpg)
Homebuyers dont feel quite comfortable with the economy: NAHB CEO Jim Tobin
NAHB CEO Jim Tobin discusses changes in the real estate business as new rules are set to take place for realtors and the impact of markets on the industry.
Mortgage rates moved up a bit this week but are still at the lowest point they have been in more than a year.
Freddie Mac's latest Primary Mortgage Market Survey, released Thursday, showed that the average rate on the benchmark 30-year fixed mortgage edged up to 6.49% this week from 6.47% last week. The average rate on a 30-year loan was 7.09% a year ago.
![voyager 1 is it still working home for sale](https://a57.foxnews.com/static.foxbusiness.com/foxbusiness.com/content/uploads/2024/08/931/523/home-sale-7.jpg?ve=1&tl=1)
A sign is posted in front of a home for sale on August 7, 2024, in San Rafael, California. Mortgage rates edged up a bit this week. (Justin Sullivan/Getty Images / Getty Images)
"While rates increased slightly this week, they remain more than half a percent lower than the same time last year," said Sam Khater, Freddie Mac’s chief economist. "In 2023, the 30-year fixed-rate mortgage nearly hit 8 percent, slamming the brakes on the housing market. Now, the 30-year fixed-rate hovers around 6.5 percent and will likely trend downward in the coming months as inflation continues to slow.
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The average rate on the 15-year fixed mortgage rose to 5.66% from 5.63% last week. One year ago, the rate on the 15-year fixed note averaged 6.46%.
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Raiders TE Doing Whatever it Takes to Help the Team Win
Michael canelo | 18 hours ago.
![Las Vegas Raiders TE Harrison Bryant Las Vegas Raiders TE Harrison Bryant](https://images2.minutemediacdn.com/image/upload/c_crop,w_2048,h_1152,x_0,y_0/c_fill,w_720,ar_16:9,f_auto,q_auto,g_auto/images/voltaxMediaLibrary/mmsport/raiders_today/01j5e2awztjq02mtds6k.jpg)
- Las Vegas Raiders
The Las Vegas Raiders have given their quarterbacks solid weapons to work with for this upcoming season.
The Raiders' offense just needs to show what it is capable of with these weapons. An argument can be made that the Raiders, on paper, have the best offensive supporting cast in the league. You have two No. 1 receivers, two No. 1 tight ends, an up-and-coming running back and a strong offensive line.
It could be difficult for the three- and four-stringers to establish themselves in this offense. But that does not mean they won't have an impact on this Raiders team.
For new Raiders tight end, Harrison Bryant , he has two very talented players ahead of him on the depth chart. Bryant is still having a strong offseason and brings valuable experience and knowledge of the Luke Getsy offense.
"I was extremely excited to sign here. For the opportunity," Bryant said . "Obviously, they go out and draft Brock [Bowers], who is an amazing player. My focus once that happened and camp started, really was just focus on myself, focus on making this team, and focusing on trying to carve out a role and just do whatever I can to help the team succeed. Whatever that is on offense or special teams, so that is really my mindset."
" ... It all depends on game plans. How coach Getsy wants to attack teams. You know really, like I said, just trying to improve my game, just to show that I am capable of being on the field. Trying to make it hard for them to keep me off the field, really. That is my goal. Do whatever I can to help the team."
" ... Obviously they are extremely talented football players, but this is one of the closest knit tight end rooms I have been a part of so far. Everyone in there is a good dude. We all get along. We all have fun. Coach [Luke] Steckel keeps it light, but he is very to the point. Getting us prepared for what we need to do every day."
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MICHAEL CANELO
Little League World Series: Friday results and highlights after three shutout wins
![voyager 1 is it still working The Little League Baseball World Series will be played in Williamsport, Pa. from August 14-25, 2024 with 20 teams competing for this year's title.](https://www.usatoday.com/gcdn/authoring/authoring-images/2024/08/11/USAT/74760347007-081024-ust-stock-12-1.jpg?width=660&height=440&fit=crop&format=pjpg&auto=webp)
The 2024 Little League World Series is underway with thrilling games on Friday and will culminate on Sunday, August 25, with the crowning of a new champion. This champion will be the one who has proven their mettle among the best young athletes, earning the prestigious LLWS trophy.
Day 3 of this year's Little League World Series (LLWS) wasn't as exciting as prior days with top-notch pitching taking center stage. Three of the four games were shutouts: Venezuela won 10-0 over Mexico, Hawaii beat Illinois 5-0, and Chinese Taipei won 11-0 over Australia.
The lone non-shutout was still a convincing win with Florida taking a 6-1 win over Washington. Here are some of the highlights from Friday's action in Pennsylvania:
2024 Little League World Series: Scores, highlights, day 1 recap
Little League World Series: Aug. 16 schedule
All four games on Friday will be broadcast on ESPN.
Follow every MLB game: Latest MLB scores, stats, schedules and standings.
All times Eastern.
LLWS Round 1
- Mexico vs. Venezuela, 1 p.m. | Volunteer Stadium
- Hawaii vs. Illinois, 3 p.m. | Lamade Stadium
- Chinese Taipei vs. Australia, 5 p.m. | Volunteer Stadium
- Florida vs. Washington, 7 p.m. | Lamade Stadium
How to watch: Follow Friday's LLWS games with an ESPN+ subscription
Florida extends the lead
Another pair of runs makes it 5-1 Florida entering the bottom of the fourth inning.
Florida holds Washington to one run
After Hemenway II's run, Florida notches a third out six pitches later to stay ahead 3-1 after three frames.
Washington gets on the board
Today's finale won't be another shutout. William Hemenway II scored on an error to make 3-1 with two outs in the bottom of the third.
Florida makes it 3-0
Another run extends the lead before Washington takes to the plate.
Florida scores another run
Florida's Hunter Alexander hit a slow-rolling infield single to score Lathan Norton and makes it a 2-0 game with one out in the top of the third.
Washington can't answer
The Northwest Region champions couldn't get on the board in the second inning. Florida keeps a 1-0 lead entering the third.
Florida gets on the board to lead 1-0
A sacrifice fly plated a runner for the Southeast Region champions to give them a 1-0 lead midway through the second inning.
Florida-Washington scoreless after the first frame
Another pitching duel could be in the works for the final game of the day as the first inning ends 0-0.
Florida vs. Washington: Game start
Florida beat South Dakota 2-1 on Wednesday to set up a game against Washington.
Chinese Taipei continues the shutout streak
Chinese Taipei made it three shutouts in three games today from South Williamsburg with an 11-0 win over Australia.
Australia scoreless heading into the fifth
Australia finally connected with a hit against Chinese Taipei but failed to capitalize on the opportunity. They remain scoreless heading into the fifth.
Chinese Taipei scores two more in the third
Chinese Taipei extends its lead to 8-0 after scoring two runs in the third inning. Australia is up to bat at the bottom of the third.
Australia holds Chinese Taipei in the second
Australia seems to be in a groove and prevents Chinese Taipei from adding any runs to the scoreboard. Australia is up to bat at the bottom of the second.
Australia remains scoreless into the second
Australia failed to respond to Chinese Taipei's strong first-inning performance and remains scoreless as Chinese Taipei takes the bat at the top of the second.
Chinese Taipei makes it 6-0
Chinese Taipei continues their momentum and adds five more runs to take a 6-0 lead over Australia. Australia is up to bat in the bottom of the first.
Chinese Taipei on the board first against Australia
Chinese Taipei comes out strong, scoring first to take a 1-0 lead in the top of the first inning.
Hawaii earns shutout win over Illinois
Tavares' strong performance from the mound powered a 5-0 victory over Illinois. Hawaii becomes the first United States team to win two games following their victory over New England on Wednesday.
Illinois shut out again
Tavares is still dealing from the mound as Hawaii leads 4-0 through the fourth inning.
![](http://adsite.space/777/templates/cheerup/res/banner1.gif)
Tavares pushes Hawaii's lead to 4-0
The starting pitcher can get it done at the plate, too. His hit scored two runners to give Hawaii a 4-0 lead.
Pitching change for Illinois
Hawaii's scored a run in the third and, with the bases loaded, Illinois took out Phelan after 65 pitches.
Tavares keeps Illinois off the board
Hawaii's pitcher notched another two strikeouts in the third inning to keep Hawaii up 1-0.
Pitching duel in Lamade
Illinois' Dillon Phelan is matching Hawaii's Tavares with four strikeouts through two innings. Runs will be hard to come by as Hawaii holds a 1-0 lead heading into the third.
Tavares powers 1-0 Hawaii lead
The 5-foot-10 lefty Evan Tavares has struck out five batters through two frames to put Hawaii up 1-0 midway through the second inning.
Game start: Hawaii vs. Illinois
Hawaii heads to the plate first in their second game of the tournament following a 3-1 win over New England on Wednesday. Illinois is making its debut today.
Venezuela wins 10-0 over Mexico
Three batters were quickly retired as Venezuela sealed a 10-0 win over Mexico. They've now won eight consecutive games dating back to the start of their regional run.
Pressure is on for Mexico in the fourth
Mexico notched a third out before Venezuela could score again. But now they have to score at least one run in the bottom of the fourth to keep from a mercy rule loss.
Venezuela makes it 10-0
A double play notched two outs but Venezuela's Santiago Bello still scored to make it 10-0 and make the mercy rule possible. Venezuela has a runner on third and, if he scores, the pressure is on Mexico to close the margin in order to keep the game going.
Mexico still scoreless entering the fourth inning
After three innings, Mexico is yet to get on the board. If Venezuela scores one run and Mexico remains scoreless in the fourth, the Little League World Series 10-run mercy rule mandates Mexico must concede the game.
Venezuela pouring it on in the third
Multiple pitching changes haven't made a difference for Mexico in the third inning as Veneuzela's extended the lead to 9-0.
Venezuela extends the lead in third inning
A pop fly to right field with an error led to an RBI double for Venezuela and make it 6-0 with two outs in the top of the third.
Double play ends top of the second inning
A double play keeps it 4-0 heading into the bottom of the second.
Yepez holds Mexico scoreless
Venezuela's starting pitcher retired three batters in a row to close the first frame with a 4-0 lead for Venezuela.
Venezuela takes 4-0 lead over Mexico
Jhonson Freitez's three-run home run in the top of the first inning opened up the game for Venezuela. Mexico shut out the Caribbean in Game 1 of their international schedule. Things will be very different today.
2024 Little League World Series: Time, TV, streaming and how to watch
All 39 games of the Little League World Series will be broadcast on ESPN, ESPN2, or ABC, with streaming options including ESPN+ , the ESPN app, and fuboTV . Coverage begins at 1 p.m. ET.
When is the LLWS championship game?
The LLWS championship game is slated for Sunday, Aug. 25, at 3 p.m. ET. The third-place consolation game will take place the same day at 10 a.m. ET.
The international and U.S. championship games — which serve as the semifinals to Sunday's championship game — will take place on Saturday, Aug. 24 at 12:30 and 3:30 p.m. ET, respectively.
How does the Little League World Series work?
The Little League World Series is split into two brackets: the United States bracket and the international bracket. Each bracket will play out their own individual tournaments, with the winner from each bracket facing each other in the championship.
The U.S. and international brackets are double-elimination brackets, meaning a team must lose twice before it is eliminated from the tournament.
The 2024 U.S. Regional Champions
- Great Lakes - Hinsdale Little League - Hinsdale, Illinois
- Metro - South Shore Little League - Staten Island, New York
- Mid-Atlantic - Council Rock Newtown Little League - Newtown, Pennsylvania
- Midwest - Sioux Falls Little League - Sioux Falls, South Dakota
- Mountain - Paseo Verde Little League - Henderson, Nevada
- New England - Salem Little League - Salem, New Hampshire
- Northwest - South Hill Little League - Puyallup, Washington
- Southeast - Lake Mary Little League - Lake Mary, Florida
- Southwest - Boerne Little League - Boerne, Texas
- West - Central East Maui Little League - Wailuku, Hawaii
The 2024 International Regional Champions
- Asia-Pacific - Kuei-Shan Little League - Taoyuan City, Chinese Taipei
- Australia - Hills Little League - Sydney, New South Wales
- Canada - Whalley Little League - Surrey, British Columbia
- Caribbean - Aruba Center Little League - Santa Cruz, Aruba
- Cuba - Santa Clara Little League - Villa Clara, Cuba
- Europe-Africa - South Czech Republic Little League - Brno, Czech Republic
- Japan - Johoku Little League - Tokyo, Japan
- Latin America - Cardenales Little League - Barquisimeto, Venezuela
- Mexico - Matamoros Little League - Tamaulipas, Mexico
- Puerto Rico - Radames Lopez Little League - Guayama, Puerto Rico
LLWS bracket and schedule
Here is the full 2024 LLWS bracket, courtesy of the Little League World Series:
Past Little League World Series results
Teams from the United States have dominated the Little League World Series as of late, having won each of the last five dating back to 2017. The last international team to win the tournament was Japan, who beat Lufkin, Texas 12-2 in just five innings in the 2017 final.
List of past winners:
Results date back to 2010 LLWS.
- 2023: El Segundo, Calif.
- 2022: Honolulu
- 2021: Taylor, Mich.
- 2020: Canceled due to COVID
- 2019: River Ridge, La.
- 2018: Honolulu
- 2017: Tokyo
- 2016: Maine-Endwell, N.Y.
- 2015: Tokyo
- 2014: Seoul, South Korea
- 2013: Tokyo
- 2012: Tokyo
- 2011: Huntington Beach, Calif.
- 2010: Tokyo
When is the 2024 MLB Little League Classic? TV, time and how to watch
The seventh annual MLB Little League Classic will take place on Monday, Aug. 18 at 9 a.m. ET with the New York Yankees taking on the Detroit Tigers in Williamsport. The game will air on ESPN.
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Watch CBS News
Kamala Harris releases economic plan aiming to lower housing costs, end price gouging
By Nidia Cavazos , Kathryn Watson
Updated on: August 17, 2024 / 8:49 AM EDT / CBS News
Vice President Kamala Harris unveiled her economic plans Friday in Raleigh, North Carolina, marking the first time she has released a major policy initiative since President Biden dropped out of the race last month.
North Carolina is a key battleground state in November, and Harris is trying to persuade voters there and across the country that her policies can bring costs down and give Americans economic opportunity. Harris noted it was her 16th visit to the state since becoming vice president — and President Biden's first stop after the fateful debate performance that ultimately led to his departure from the race.
Harris said she would offer more details about her economic plan in the weeks ahead but on Friday, she focused efforts to lower the cost of living.
"When I am elected president, I will make it a top priority to bring down costs and increase economic security for all Americans," Harris said at Wake Tech Community College in Raleigh. "As president, I will take on the high costs that matter most to most Americans, like the cost of food. We all know that prices went up during the pandemic when the supply chains shut down and failed. But our supply chains have now improved. And prices are still too high."
Harris also blasted former President Donald Trump over his economic policies. She said Trump would impose "what is in effect a national sales tax," referring to recent remarks Trump made about expanding tariffs on goods imported into the U.S. by 10-20%.
![voyager 1 is it still working Election 2024 Harris](https://assets1.cbsnewsstatic.com/hub/i/r/2024/08/16/06ecf640-a0bb-48fd-8f9c-573ceba0d0a7/thumbnail/620x414g2/ac24b50e8f637012be859a37bdd77477/ap24229667674336.jpg?v=d8f7565ef3e8b72561ee316b5993cbf9#)
New housing
Harris is calling for the construction of 3 million new housing units in her first four years in office. The Biden administration has previously called for the construction of 2 million new homes .
She wants to incentivize these new units with a tax break for builders who construct properties for first-time home buyers. She is also proposing a $40 billion fund to help local governments find solutions to the lack of housing supply.
"There's a serious housing shortage. In many places, it's too difficult to build, and it's driving prices up," Harris said. "As president, I will work in partnership with industry to build the housing we need, both to rent and to buy. We will take down barriers and cut red tape, including at the state and local levels. And by the end of my first term, we will end America's housing shortage by building 3 million new homes and rentals that are affordable for the middle class."
Campaign officials said Harris will call on Congress to pass the Preventing the Algorithmic Facilitation of Rental Housing Cartels Act, which would prevent landlords from using price-fixing algorithms to increase rents. She also wants lawmakers to pass the Stop Predatory Investing Act, a bill that would limit tax breaks for large investors and private equity firms that acquire single-family rental homes in bulk.
"Some corporate landlords, some of them, buy dozens if not hundreds of houses and apartments," Harris said. "Then they turn them around and rent them out at extremely high prices. And it can make it impossible then for regular people to buy or even rent a home."
Harris will also propose providing Americans who have paid their rent on time for two years with up to $25,000 in down-payment assistance, with more support for first-generation homeowners.
Expansion of Child Tax Credit
Harris is also proposing an expansion of the Child Tax Credit to provide a $6,000 tax cut to families with newborns. GOP vice presidential nominee and Ohio Sen. JD Vance has proposed a similar but more general $5,000 Child Tax Credit expansion. The Committee for a Responsible Federal Budget pointed out that this Vance's proposal, which is 150% above the current $2,000 tax credit, could mean creating trillions in debt. "We could easily be talking about $2-$3 trillion in additional borrowing over the next decade," Marc Goldwein, senior policy director for the Committee for a Responsible Federal Budget, told CBS MoneyWatch regarding the Vance proposal.
Vance has suggested his tax credit would not be subject to income thresholds, while Harris' proposal would apply to lower- and middle-income families.
Trump campaign senior adviser Brian Hughes said there's been "a lot of talk from the Harris campaign criticizing Senator Vance and campaign for advocating for policies that are pro-family and meant to support those who are raising children. So it is a bit ironic to see the Vice President Harris suddenly embrace policies that she seemed to stop at just a few weeks ago."
Harris also wants to restore the Child Tax Credit to the pandemic-era American Rescue Plan levels , which would give working- and middle-class families with children up to $3,600 per child.
She is also proposing a Earned Income Tax Credit of $1,500 for those in lower-income jobs who aren't raising a child. The campaign also emphasized that Harris will ensure "no one earning less than $400,000 a year will pay more in new taxes."
Both Vance's and Harris' proposals would require congressional approval.
Addressing inflation
In North Carolina, Harris also talked about how much higher prices are for specific goods like bread than they were pre-pandemic, something Mr. Biden has typically been less likely to do.
In the first 100 days of her administration, Harris, according to a campaign fact sheet, would work to bring down the cost of groceries by working with Congress on a federal ban on price gouging on groceries and other goods and new authorities for the Federal Trade Commission and state attorneys general to enable them to impose penalties on rule-breaking companies.
"Look, the bills add up," Harris said Friday. "Food, rent, gas, back to school clothes, prescription medication — after all that, for many families, there's not much left at the end of the month."
Extreme consolidation in the food industry has led to higher prices that account for a large part of higher grocery bills. Harris plans to crack down on unfair mergers and acquisitions that give big food corporations the power to jack up food and grocery prices and undermine the competition that keeps prices low for consumers. And her plan aims to support smaller businesses, like grocery stores, meat processors, farmers and ranchers, so those industries can be more competitive.
According to the most recent CBS News poll , only 9% of registered voters rated the condition of the national economy as "very good," with the economy and inflation ranking as the top issue of concern consistently across 2024 polls. Inflation has cooled since its peak in June 2022, but many voters are still feeling financial strain. Prices are still 20% higher overall than prior to the COVID-19 pandemic.
In a statement, the Trump campaign accused Harris of trying to implement price controls, which it said "have been tried — and failed — throughout history as they inevitably lead to food lines, shortages, and skyrocketing inequality." The Trump campaign also blamed Harris' and Mr. Biden's economic policies for creating the problem, "aided and abetted by Harris's tiebreaking votes on trillions in inflationary spending." However, economists have said that pandemic-related federal spending by both Trump and Mr. Biden fueled high inflation.
Throughout battleground states, voters often tell CBS News that the economy remains a top issue when heading to the voting booths.
"Workforce development, creating job opportunities, making sure everyone can advance in different career fields," said Abraham Camejo in Las Vegas ahead of Harris' rally on Saturday when asked about economic priorities. "The policies that benefit big corporations and the middle class are different."
According to a recent CBS News poll , on a question about policies that will improve people's finances, Harris trailed Trump with 45% of registered voters saying they'd be financially better off with the former president, compared to 25% for Harris.
Eliminating taxes on tips
Harris' economic policy remarks followed her pledge last Saturday at a rally in Las Vegas to eliminate taxes on tips and raise the minimum wage.
"When I am president, we will continue our fight for working families including to raise the minimum wage and eliminate taxes on tips for service and hospitality workers," Harris said recently at a rally that included Nevada Culinary union members.
A Harris-Walz campaign official noted that her pledge would require legislation.
This marked the first time Harris made a proposal on eliminating taxes on tips for service workers, a similar idea to one first pitched by Trump in June, also at a rally in Las Vegas.
In 2025, lawmakers are set to have a major opening on tax legislation given the expiration of some tax changes made during Trump's presidency in 2017. Control of Congress is likely to be a major factor on this issue, since Republicans held the House, Senate and White House when Trump's 2017 tax cuts became law.
Aaron Navarro contributed to this report.
- Kamala Harris
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Nidia Cavazos is a 2024 campaign reporter for CBS News.
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NASA's interstellar Voyager 1 spacecraft isn't doing so well — here's what we know
Since late 2023, engineers have been trying to get the Voyager spacecraft back online.
![voyager 1 is it still working Voyager 1 rendering of the craft out in space, on the right side of the image.](https://cdn.mos.cms.futurecdn.net/V3BkqtQLMP34yuGfzLUUxT-320-80.jpg)
On Dec. 12, 2023, NASA shared some worrisome news about Voyager 1, the first probe to walk away from our solar system 's gravitational party and enter the isolation of interstellar space . Surrounded by darkness, Voyager 1 seems to be glitching.
It has been out there for more than 45 years, having supplied us with a bounty of treasure like the discovery of two new moons of Jupiter, another incredible ring of Saturn and the warm feeling that comes from knowing pieces of our lives will drift across the cosmos even after we're gone. (See: The Golden Record .) But now, Voyager 1 's fate seems to be uncertain.
As of Feb. 6, NASA said the team remains working on bringing the spacecraft back to proper health. "Engineers are still working to resolve a data issue on Voyager 1," NASA's Jet Propulsion Laboratory said in a post on X (formerly Twitter). "We can talk to the spacecraft, and it can hear us, but it's a slow process given the spacecraft's incredible distance from Earth."
Related: NASA's interstellar Voyager probes get software updates beamed from 12 billion miles away
So, on the bright side, even though Voyager 1 sits so utterly far away from us, ground control can actually communicate with it. In fact, last year, scientists beamed some software updates to the spacecraft as well as its counterpart, Voyager 2 , from billions of miles away. Though on the dimmer side, due to that distance, a single back-and-forth communication between Voyager 1 and anyone on Earth takes a total of 45 hours. If NASA finds a solution, it won't be for some time .
The issue, engineers realized, has to do with one of Voyager 1's onboard computers known as the Flight Data System, or FDS. (The backup FDS stopped working in 1981.)
"The FDS is not communicating properly with one of the probe's subsystems, called the telemetry modulation unit (TMU)," NASA said in a blog post. "As a result, no science or engineering data is being sent back to Earth." This is of course despite the fact that ground control can indeed send information to Voyager 1, which, at the time of writing this article , sits about 162 AU's from our planet. One AU is equal to the distance between the Earth and the sun , or 149,597,870.7 kilometers (92,955,807.3 miles).
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From the beginning
Voyager 1's FDS dilemma was first noticed last year , after the probe's TMU stopped sending back clear data and started procuring a bunch of rubbish.
As NASA explains in the blog post, one of the FDS' core jobs is to collect information about the spacecraft itself, in terms of its health and general status. "It then combines that information into a single data 'package' to be sent back to Earth by the TMU," the post says. "The data is in the form of ones and zeros, or binary code."
However, the TMU seemed to be shuffling back a non-intelligible version of binary code recently. Or, as the team puts it, it seems like the system is "stuck." Yes, the engineers tried turning it off and on again.
That didn't work.
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Then, in early February, Suzanne Dodd, Voyager project manager at NASA's Jet Propulsion Laboratory, told Ars Technica that the team might have pinpointed what's going on with the FDS at last. The theory is that the problem lies somewhere with the FDS' memory; there might be a computer bit that got corrupted. Unfortunately, though, because the FDS and TMU work together to relay information about the spacecraft's health, engineers are having a hard time figuring out where exactly the possible corruption may exist. The messenger is the one that needs a messenger.
They do know, however, that the spacecraft must be alive because they are receiving what's known as a "carrier tone." Carrier tone wavelengths don't carry information, but they are signals nonetheless, akin to a heartbeat. It's also worth considering that Voyager 1 has experienced problems before, such as in 2022 when the probe's "attitude articulation and control system" exhibited some blips that were ultimately patched up. Something similar happened to Voyager 2 during the summer of 2023, when Voyager 1's twin suffered some antenna complications before coming right back online again.
Still, Dodd says this situation has been the most serious since she began working on the historic Voyager mission.
Join our Space Forums to keep talking space on the latest missions, night sky and more! And if you have a news tip, correction or comment, let us know at: [email protected].
Monisha Ravisetti is Space.com's Astronomy Editor. She covers black holes, star explosions, gravitational waves, exoplanet discoveries and other enigmas hidden across the fabric of space and time. Previously, she was a science writer at CNET, and before that, reported for The Academic Times. Prior to becoming a writer, she was an immunology researcher at Weill Cornell Medical Center in New York. She graduated from New York University in 2018 with a B.A. in philosophy, physics and chemistry. She spends too much time playing online chess. Her favorite planet is Earth.
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- Classical Motion There must be more to this story. Let me see if I have this right. They can receive a carrier. But the modulator gives them junk. Or possibly the processor's memory. And they can send new software. New instructions. So, why not simply use the packet data, to key the carrier on and off. OOK On and Off Keying. Telegraphy. Reply
Admin said: NASA's Voyager 1 deep space probe started glitching last year, and scientists aren't sure they can fix it. NASA's interstellar Voyager 1 spacecraft isn't doing so well — here's what we know : Read more
- Classical Motion I wish something would kick one of them back to us. I would love to see an analysis of every cubic cm of it. Reply
- billslugg Modulating the carrier wave would do no good unless the carrier knew what information to send us. The unit that failed takes the raw data and then tells the carrier what to say. Without the modulation unit there is no data to send. Reply
Classical Motion said: I wish something would kick one of them back to us. I would love to see an analysis of every cubic cm of it.
- Classical Motion I read that they were not sure if it was the modulator or the packet memory. The packet buffer. If they can send patch, it's easy to relocate that buffer into another section of memory. This can be done at several different memory locations to verify if it is a memory problem. If that works, then the modulator is ok. If the modulator fails with all those buffers, then it's the modulator. Turn off modulator. Just enable the carrier for a certain duration for a 1 bit. And turn it off for that certain duration for a 0 bit. One simply rotates that buffer string thru the accumulator at the duration rate, and use status flags to key the transmitter. Very simple and very short code. The packet is nothing more that a 128 BYTE or multiple size string of 1s and 0s. OOK is a very common wireless modulation. That's why I commented on more must be going on. And I would like to see what 30 years naked in space does to man molded matter. Reply
Classical Motion said: I read that they were not sure if it was the modulator or the packet memory. The packet buffer. If they can send patch, it's easy to relocate that buffer into another section of memory. This can be done at several different memory locations to verify if it is a memory problem. If that works, then the modulator is ok. If the modulator fails with all those buffers, then it's the modulator. Turn off modulator. Just enable the carrier for a certain duration for a 1 bit. And turn it off for that certain duration for a 0 bit. One simply rotates that buffer string thru the accumulator at the duration rate, and use status flags to key the transmitter. Very simple and very short code. The packet is nothing more that a 128 BYTE or multiple size string of 1s and 0s. OOK is a very common wireless modulation. That's why I commented on more must be going on. And I would like to see what 30 years naked in space does to man molded matter.
- damienassurre I think they should make another space craft and have it pick up voyager 1 and bring it back the info it went through would very valuable to stellar travel Reply
damienassurre said: I think they should make another space craft and have it pick up voyager 1 and bring it back the info it went through would very valuable to stellar travel
- billslugg The newer forms of memory can't be used easily in outer space as their feature size is too small and too easily corrupted by a cosmic ray. Very large, bulky features keep spacecraft memory far smaller than what earthbound computers can enjoy. As far as returning one of the Voyagers to Earth, it would take several thousand years using available technology. Better to wait for more advanced propulsion technologies. Reply
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No one could’ve seen Danny Parkins’ ascent to a national-TV job coming. That includes Parkins himself.
“I really don’t know the answer to that,” Parkins told me last month when asked what he hoped to achieve from fill-in appearances on FS1. “All of that I would’ve thought was … I never really even considered it 10 weeks ago. So it’s happened fast.”
So fast, in fact, that Parkins will make his final appearance as an employee at The Score on Friday, when he concludes his 24-hour radiothon to benefit cancer research and thus his 7 1/2 years at the station. Then it’s off to New York, where he’ll be part of a new morning show at FS1 , which will unveil a revamped lineup in time for football season.
The Score afternoon show with Parkins and Matt Spiegel lasted only three years, but it was unique in local sports radio. It was a throwback to the glory days of the genre with Parkins’ bits and tendency to push the envelope. As I’ve written for our annual Chicago sports-media rankings , stuff happened on that show, mostly fun and interesting, occasionally bizarre and appalling. Overall, it was great radio.
Now Mitch Rosen, vice president of The Score, has a decision to make. How does he replace the driver of a show that, according to Nielsen, rated fourth (5.0) in the market in its time slot this spring among men 25-54? Who could come in and essentially pick up where Parkins left off? Not serve as a clone, but provide the familiarity and knowledge that would keep the show on track and maybe even elevate it.
If Rosen were to ask me – and I don’t see that happening – I’d tell him there’s one person on this planet who checks all the boxes. One person who could walk into that studio and immediately connect with his co-workers and audience. He would bring diversity of race, thought and experience. His presence would right a wrong that’s almost 6 1/2 years old yet still wafts over the station like a foul odor.
That person is Jason Goff.
In March 2018, former station boss Jimmy deCastro revamped The Score’s lineup, removing then-midday host Spiegel and then-afternoon host Goff from their shows. DeCastro moved Dan Bernstein from afternoon to midday alongside Connor McKnight, and he moved Parkins, in just his second year at the station, from midday to afternoon with Dan McNeil.
It’s believed that the Bernstein-Goff pairing had strayed too far from sports talk, at least for deCastro’s taste, and spent too much time on social issues. Never mind that it was some of the best radio on the station. Though the changes didn’t hurt The Score in its ratings battle with ESPN 1000, they stunned the staff and they stung Goff, who had been with the station since 2000 apart from two years in Atlanta.
Goff has recovered well. In 2019, NBC Sports Chicago hired him to be the Bulls pregame and postgame host. In 2021, Bill Simmons hired him to host a Chicago sports show on his network of podcasts at The Ringer. And in the last few years, Goff has made occasional appearances on The Score, even in-studio, returning his charisma and wit to the airwaves.
Indications are that Rosen is looking to hire someone for the afternoon show, not move the successful midday show with Bernstein and Laurence Holmes, plus Leila Rahimi on Wednesdays, to the afternoon. In his memo to staff announcing Parkins’ departure, Rosen said he, senior vice president and market manager Kevin Cassidy and program manager Ryan Porth “have begun the process of identifying the next host for our afternoon show.” He reiterated that on Parkins’ farewell show Wednesday.
It makes sense to leave Bernstein and Holmes in midday, where they tied for sixth at 4.7 in the spring. Plus, Goff worked with Spiegel before teaming with Bernstein. But an afternoon shift could pose a problem for Goff, who still might host Bulls shoulder programming for the new Chicago Sports Network. A deal isn’t finalized, but if one gets done, someone would have to give on game nights between The Score and CHSN. That, of course, assumes Goff wants to return to The Score.
Here’s hoping he does because, as he continues to prove, Goff is excellent at talking, and there are a lot of people who would love to hear “Jason from Evanston” more often.
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How Did Mpox Become a Global Emergency? What’s Next?
The virus is evolving, and the newest version spreads more often through heterosexual populations. Sweden reported the first case outside Africa.
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By Apoorva Mandavilli
Apoorva Mandavilli covered the 2022 mpox outbreak and the Covid-19 pandemic.
Faced once again with a rapidly spreading epidemic of mpox, the World Health Organization on Wednesday declared a global health emergency. The last time the W.H.O. made that call was in 2022, when the disease was still called monkeypox.
Ultimately the outbreak affected nearly 100,000 people worldwide, primarily gay and bisexual men, including more than 32,000 in the United States.
The W.H.O.’s decision this time was prompted by an escalating crisis of mpox concentrated in the Democratic Republic of Congo. It recently spread to a dozen other African countries. If it is not contained, the virus again may rampage all over the world, experts warned.
On Thursday, Sweden reported the first case of a deadlier form of mpox outside Africa , in a person who had traveled to the continent. “Occasional imported cases like the current one may continue to occur,” the country’s public health agency warned.
“There’s a need for concerted effort by all stakeholders, not only in Africa, but everywhere else,” Dr. Dimie Ogoina, a Nigerian scientist and chair of the W.H.O.’s mpox emergency committee, said on Wednesday.
Congo alone has reported 15,600 mpox cases and 537 deaths, most of them among children under 15, indicating that the nature of the disease and its mode of spread may have changed.
Here’s what to know.
Is this the virus we saw in 2022?
This is a different version of the mpox virus.
Mpox is a close relative of the smallpox virus. There are two main types: Clade I, the version that is dominant in Congo, and Clade II, a form of which caused the 2022 global outbreak. (A clade is a genetically and clinically distinct group of viruses.)
Clade I mpox is generally thought to cause more severe illness and to have a much higher mortality rate, which is one reason the W.H.O. is sounding the alarm now. Officials hope to contain this outbreak before it spreads to other continents.
The infection may resemble an ordinary respiratory illness at first but later blooms into a raised rash in the mouth, hands, feet or genitals. The virus spreads mainly through close contact — directly with the skin or fluids of an infected person, or with contaminated bed linens and other items.
Scientists learned during the 2022 outbreak that mpox can spread even in the absence of symptoms. And the rash may be mistaken for other diseases such as measles or chickenpox, particularly in young children.
Who is getting infected this time?
In the 2022 outbreak, mpox spread globally mainly among gay and bisexual men. Behavioral changes in that community helped to contain the virus, and vaccination at the time, or now, will help protect them.
Until recently, most cases in Congo resulted from consumption of contaminated meat or close contact with infected animals and people. But last year, scientists discovered a new subtype of mpox, Clade Ib, which appears to spread from person to person primarily through heterosexual transmission .
Most cases have been observed in prostitutes, truckers and other transient workers.
“Sex is probably the primary driver, and then the secondary driver is close contact and households,” said Dr. Jay Varma, the chief medical officer at SIGA Technologies, which manufactures tecovirimat, a drug used to treat mpox infection.
As with many other infections, most people with healthy immune systems are unlikely to become severely ill with mpox. Those who have weakened immune systems, including those living with H.I.V., are at highest risk of severe illness and death .
Older adults, who are typically more susceptible to infections, may be at least somewhat protected by their childhood vaccinations for smallpox, which ended in the United States in 1972.
Most of the deaths in Congo have been in children under 15, perhaps because their health may already be compromised by poor medical care, malnutrition and the many other pathogens they face.
Has the outbreak spread to the United States or Europe?
Many countries worldwide, including the United States, have continued to see patients with Clade IIb mpox, the version that caused the 2022 outbreak.
So far this year, there have been about 740 cases of mpox in the United States, more than double the number at this time last year, according to the Centers for Disease Control and Prevention.
Just one case of the more severe Clade I infection has been reported in Europe — in Sweden, in a person who had traveled to Africa. Other so-called “imported” cases seem likely. But experts tend to worry more about community transmission.
“I don’t think the risk right now for Americans is high at all, but what this is telling us is that we have to be vigilant,” said Dr. Trish Perl, an infectious disease physician at UT Southwestern Medical Center.
But previous epidemics, including of mpox, illustrate that an uncontrolled outbreak anywhere in the world may eventually turn up everywhere, Dr. Varma said. Since December, the C.D.C. has twice warned clinicians and the general public to remain alert for signs of mpox.
“I really think it’s only a matter of time before North America, Europe, etc., start to see cases,” he said, referring to the deadlier viral subtype. “Unless we invest in disease control everywhere, we’re going to remain always at risk.”
Will the vaccine still protect against mpox?
Two doses of the mpox vaccine Jynneos should protect against all versions of the virus, experts said.
Jynneos, made by Bavarian Nordic, was used in 2022 in the United States and Europe. The vaccine, initially developed against smallpox, should protect against mpox and all other members of that virus family, said Dr. Boghuma Titanji, an infectious diseases physician at Emory University in Atlanta.
Several studies have shown that antibodies prompted by the Jynneos vaccine wane and may be undetectable within a year. But other research has found that two doses effectively prevent severe illness , Dr. Titanji said.
In the United States, however, fewer than one in four people for whom vaccination was recommended got two doses.
“People were less interested in coming back and getting that second dose, or even starting the course of their vaccination,” Dr. Titanji said. “Maybe we will see an increase in uptick in vaccination, and this will serve as a reminder for people to come in and get vaccinated.”
In 2022, the federal government provided the shots at no cost. Jynneos is now commercially available, and some insurance companies may cover the cost.
For some patients, the shots may prove too expensive , Dr. Perl said. If mpox cases were to escalate, the U.S. government may again make the shots available free of charge, according to a federal official with knowledge of the situation.
Is the U.S. prepared for another bout with mpox?
Yes and no.
Scientists learned a lot about the virus in 2022 and have identified vaccines and treatments. But they do not fully understand how the deadlier virus is spreading in Africa, especially among children, or who is most at risk.
“This is very, very crucial when you think about designing a response strategy,” Dr. Titanji said.
There are few resources allocated to fighting sexually transmitted infections in the United States, said David Harvey, the executive director of the National Coalition of STD Directors.
Officials have not solved the problems that hobbled the response in 2022, including poor uptake of the vaccine and “a shockingly underfunded S.T.I. public health system,” Mr. Harvey said.
“Today, we worry about an mpox outbreak,” he added. “We’re already dealing with syphilis, and tomorrow there will be another outbreak of an S.T.I.”
Apoorva Mandavilli is a reporter focused on science and global health. She was a part of the team that won the 2021 Pulitzer Prize for Public Service for coverage of the pandemic. More about Apoorva Mandavilli
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On Saturday, April 5, Voyager 1 finally "phoned home" and updated its NASA operating team about its health. The interstellar explorer is back in touch after five months of sending back nonsense data.
Instrument Status. This is a real-time indicator of Voyagers' distance from Earth in astronomical units (AU) and either miles (mi) or kilometers (km). Note: Because Earth moves around the sun faster than Voyager 1 is speeding away from the inner solar system, the distance between Earth and the spacecraft actually decreases at certain times of ...
When Voyager 1 left Earth in 1977, nobody was certain where the heliopause was, according to Bill Kurth, an astrophysicist at the University of Iowa who has been working with Voyager 1 since ...
The probe and its twin, Voyager 2, are the only spacecraft to ever fly in interstellar space (the space between stars). Voyager 1 stopped sending readable science and engineering data back to Earth on Nov. 14, 2023, even though mission controllers could tell the spacecraft was still receiving their commands and otherwise operating normally.
NASA / JPL-Caltech. Voyager 1 defied the odds yet again—after over six months of technical issues potentially foreshadowing humanity's final farewell to the historic spacecraft, NASA reports ...
Even if Voyager 1 had gone dark for good, however, the mission would still have been a wild success. After it launched in 1977, its primary mission was to study Jupiter and Saturn — that was ...
Two of the four science instruments returned to their normal operating modes immediately. Two other instruments required some additional work, but now, all four are returning usable science data. The four instruments study plasma waves, magnetic fields, and particles. Voyager 1 and Voyager 2 are the only spacecraft to directly sample ...
Still, Voyager 1's new lease on life may not last very long. NASA has previously estimated that the nuclear-powered generators on Voyager 1 and Voyager 2 were likely to die around 2025.
What instruments on the spacecraft are still working and what have been turned off? View an updated list of the status o/f Voyager instruments: Mission Status. How long can Voyager 1 and 2 continue to function? ... Voyager 1 is escaping the solar system at a speed of about 3.5 AU per year, 35 degrees out of the ecliptic plane to the north, in ...
Voyager 1 has been exploring our solar system since 1977. The probe is now in interstellar space, the region outside the heliopause, or the bubble of energetic particles and magnetic fields from the Sun. Voyager 1 was launched after Voyager 2, but because of a faster route it exited the asteroid belt earlier than its twin, and it overtook Voyager 2 on Dec. 15, 1977.
NASA's Jet Propulsion Laboratory in Southern California declared success after receiving good engineering updates late last week. The team is still working to restore transmission of the science data. It takes 22 1/2 hours to send a signal to Voyager 1, more than 15 billion miles (24 billion kilometers) away in interstellar space.
Space Exploration. NASA's beloved Voyager 1 mission is back to normal science operations for the first time in more than six months, according to agency personnel. The announcement was made ...
Voyager 1 is still alive out there, barreling into the cosmos more than 15 billion miles away. However, a computer problem has kept the mission's loyal support team in Southern California from ...
In November 2023, the first spacecraft to journey to interstellar space, Voyager 1, started spouting gibberish. Now, NASA knows why. The team is working on a fix.
Voyager 2's priceless data is captured and returned to Earth through its five science instruments, while Voyager 1 still has four operational instruments after one failed earlier in the mission.
Still, Voyager 1's ground team identified the FDS as the likely source of the problem. The Flight Data Subsystem was an innovation in computing when it was developed five decades ago.
Voyager 1 has resumed returning science data from two of its four instruments for the first time since a computer issue arose with the spacecraft in November 2023. ... Not only that, they're still working. And with each passing day they are beaming back a message that, to scientists, is both unsettling and thrilling. April 27, 2011.
Voyager 2, now 12.7 billion miles from Earth, is functioning normally. However, a computer problem aboard Voyager 1 on Nov. 14, 2023, corrupted the stream of science and engineering data the craft ...
The fact that the scientists were able to build two spacecraft, and that both are still working, is even more remarkable, she adds. ... Voyager 1 hurtled through Saturn's rings (taking thousands ...
An indirect measurement was required because Voyager 1's plasma spectrometer had stopped working in 1980. [76] In September 2013, ... 3 km/s (1.9 mi/s) slower than Voyager 1 and is still slowing down. [115] Voyager 1 is expected to reach the theorized Oort cloud in about 300 years [116] [117] and take about 30,000 years to pass through it.
A poster of the planets and moons visited during the Voyager program. The Voyager program is an American scientific program that employs two interstellar probes, Voyager 1 and Voyager 2.They were launched in 1977 to take advantage of a favorable alignment of the two gas giants Jupiter and Saturn and the ice giants, Uranus and Neptune, to fly near them while collecting data for transmission ...
NASA's Voyager 1 spacecraft has experienced a computer glitch that's causing a bit of a communication breakdown between the 46-year-old probe and its mission team on Earth. Engineers are ...
Freddie Mac's latest mortgage market survey shows that the average rates for both 30- and 15-year fixed mortgages eged up a bit this week, but only slightly.
Inflation in the 12 months through July was 2.9%, sharply down from its 40-year high of 9.1% in June 2022 and the lowest since March 2021. Overall, annual food inflation rose a smaller 2.2%, with ...
The Las Vegas Raiders have given their quarterbacks solid weapons to work with for this upcoming season. ... You have two No. 1 receivers, two No. 1 tight ends, an up-and-coming running back and a ...
The lone non-shutout was still a convincing win with Florida taking a 6-1 win over Washington. Here are some of the highlights from Friday's action in Pennsylvania: 2024 Little League World Series ...
Harris also wants to restore the Child Tax Credit to the pandemic-era American Rescue Plan levels, which would give working- and middle-class families with children up to $3,600 per child.
As of Feb. 6, NASA said the team remains working on bringing the spacecraft back to proper health. "Engineers are still working to resolve a data issue on Voyager 1," NASA's Jet Propulsion ...
That's it. That's the list. Goff's return would right a wrong that's almost 6 1/2 years old yet still wafts over the station like a foul odor. Here's hoping that he can make it work — and that ...
Faced once again with a rapidly spreading epidemic of mpox, the World Health Organization on Wednesday declared a global health emergency. The last time the W.H.O. made that call was in 2022, when ...