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The most distant human-made object

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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.

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What is Voyager 1?

Voyager 1 has been exploring our solar system for more than 45 years. 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 the first spacecraft to cross the heliosphere, the boundary where the influences outside our solar system are stronger than those from our Sun.
  • Voyager 1 is the first human-made object to venture into interstellar space.
  • 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.

In Depth: Voyager 1

Voyager 1 was launched after Voyager 2, but because of a faster route, it exited the asteroid belt earlier than its twin, having overtaken Voyager 2 on Dec. 15, 1977.

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 January 30, Voyager 1 took a picture every 96 seconds for a span of 100 hours to generate a color timelapse movie to depict 10 rotations of Jupiter. On Feb. 10, 1979, the spacecraft crossed into the Jovian moon system and by early March, it had already discovered a thin (less than 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 km). 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

Saturn

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 November 12 at a range of 2,500 miles (4,000 km). Images showed a thick atmosphere that completely hid the surface. The spacecraft found that the moon’s atmosphere was composed of 90% nitrogen. Pressure ad temperature at the surface was 1.6 atmospheres and 356 °F (–180°C), respectively.

Atmospheric data suggested that Titan might be the first body in the solar system (apart from Earth) where liquid might 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 12 Nov. 12, 1980 at a range of 78,000 miles(126,000 km).

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

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 when 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

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.

Each of the Voyagers contain a “message,” prepared by a team headed by Carl Sagan, in the form of a 12-inch (30 cm) 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/second) relative to the Sun.

The Voyager spacecraft against a sparkly blue background

National Space Science Data Center: Voyager 1

A library of technical details and historic perspective.

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Our Solar System

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Pale Blue Dot at 30: Voyager 1's iconic photo of Earth from space reveals our place in the universe

The photo shows Earth as it truly is — a lonely outpost of life in an incomprehensibly vast cosmos.

NASA released this updated version of Voyager 1's famous "Pale Blue Dot" image of Earth on Feb. 13, 2020. The original was taken 30 years earlier, on Feb. 14, 1990.

Thirty years ago today, humanity got a chance to see itself in a whole new light. 

On Feb. 14, 1990, NASA's Voyager 1 probe snapped a photo of Earth from 3.7 billion miles (6 billion kilometers) away. The image shows our home planet as it truly is — a tiny, lonely outpost of life in an incomprehensibly vast cosmos — and became iconic as a result. 

The Voyager 1 team sensed at the time that the " Pale Blue Dot ," as the photo has come to be known, would be an important social document, said planetary scientist Candy Hansen, who served as the experiment representative for the Voyager imaging team and was the first person to set eyes on the Pale Blue Dot photo when it came down to Earth.

Related: Voyager at 40: 40 photos from NASA's epic 'Grand Tour' mission

The Cold War had not yet thawed completely in early 1990. The Pale Blue Dot had the potential to remind folks around the world that we're all in this together, no matter how many nuclear warheads one superpower may be aiming at another, Hansen explained. And the image remains vital today, because its message is timeless, she added.

"Now, we have climate change as an existential threat," Hansen, who now works for the Arizona-based Planetary Science Institute, told Space.com. "And we need to remind ourselves again that there's one planet that is hospitable to humans. Even if we colonize the moon or Mars one day, neither one of those bodies is really going to be able to support seven billion of us. So, we need to take care of this planet."

A family portrait

Voyager 1 launched a few weeks after its twin, Voyager 2 , back in 1977. Together, the two probes conducted an unprecedented "grand tour" of the solar system's giant planets, flying by Jupiter, Saturn, Uranus and Neptune. 

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The tour was over after the Neptune encounter, which Voyager 2 executed in August 1989. But the two spacecraft kept on flying, out toward the great unknown of interstellar space. Mission team members decided to turn off the two probes' cameras to save precious power during the long journey (and because they probably wouldn't have many chances to photograph interesting things out beyond Neptune anyway).

But Voyager 1 turned around to take one last look at home before closing its eyes. And not just its home planet — its home system. The probe took a "family portrait" series of 60 photos, capturing the sun, Venus, Jupiter, Saturn, Uranus and Neptune in addition to Earth. (Mercury was too close to the sun to be imaged, and sunlight bouncing around in the camera blocked Mars out.)

The Pale Blue Dot was the brainchild of famed astronomer, science communicator and Voyager imaging team member Carl Sagan , who first proposed snapping Earth with Voyager cameras in 1981 . And Sagan helped popularize the image and its message after the fact, writing a book called "Pale Blue Dot: A Vision of the Human Future in Space" (Random House, 1994). 

Earth was one of the last things Voyager 1 saw. The probe took the Pale Blue Dot photo at 0448 GMT on Feb. 14, 1990, just 34 minutes before its cameras were shut off forever. (The very last photos Voyager 1 took, however, were of the sun, Hansen said.)

All of the image data didn't come down to Earth until May 1, 1990, NASA officials wrote in a Pale Blue Dot explainer . Hansen couldn't wait to see our planet through Voyager 1's eyes — and, when she finally got the chance, doing so proved a bit more difficult than she had expected.

"It was actually kind of terrifying, because I didn't see it at first," she said. "Because of that beam of scattered light, it didn't pop out at me immediately. And then I was so afraid that we had missed it, or screwed up the exposure or something. So, it was such a relief when I spotted it."

That beam of scattered light may have briefly stopped Hansen's heart, but it adds a certain poetic flair to the Pale Blue Dot photo. It's almost as if the cosmos threw a spotlight onto our precious little world for a moment, to help us make it out in the abyss.

Related: Earth quiz: Do you really know your planet?

Still exploring

Both Voyagers kept flying long after February 1990. They cruised through the outer solar system and eventually popped free of the sun's sphere of influence into interstellar space.

Voyager 1 accomplished this unprecedented feat in 2012 , and its twin followed suit six years later. And both probes are still going strong. They should have enough power left to continue gathering data about their exotic surroundings through 2024 or so, mission team members have said.

The Voyager program has accomplished amazing things, shedding considerable light on the giant planets and the dark realms far beyond them. (Voyager 2, for example, is still the only spacecraft ever to get up-close looks at Uranus or Neptune.) And the Pale Blue Dot is a unique part of this diverse and layered legacy.

"The Earth picture reaches to our hearts, I would say, and all the rest goes in our heads," Hansen said.

  • Photos from NASA's Voyager 1 and 2 probes  
  • Voyager 1's historic flyby of Jupiter in photos  
  • Voyager 1 spacecraft's road to interstellar space: A photo timeline

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Michael Wall is a Senior Space Writer with  Space.com  and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.

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NASA's Voyager 1 reaches outskirts of the solar system (photos)

Traveling at 38,000 miles per hour for 33 years, Voyager 1 is now the most distant man-made object from Earth, having finally reached the outer limits of our solar system.

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"That's here. That's home. That's us."

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Io, Europa, Ganymede, and Callisto

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The best space pictures from the Voyager 1 and 2 missions

Launched in 1977, NASA’s Voyager 1 and 2 missions provided an unprecedented glimpse into the outer solar system — a liminal space once left largely to the imagination. The spacecraft provided views of worlds we’d never seen before, and in some cases, haven’t seen much of since.

The Voyager probes were launched about two weeks apart and had different trajectories, like two tour guides at the same museum. Only Voyager 2 visited the ice giants — Uranus and Neptune — for example.

The Voyagers hold a unique position in the pantheon of space history because they’re still making it; even right now, Voyagers 1 and 2 are the only functioning spacecraft in interstellar space. Both hold a Golden Record that contains sights and sounds of Earth in case alien life were to find one of the spacecraft.

As the Voyager missions voyage on, it’s good to look back at how they captured our solar system before leaving it.

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The Voyager spacecraft will probably last a billion years, says a scientist on the mission for nearly 5 decades

  • Alan Cummings has worked on the Voyager mission for over 50 years.
  • Since their launch, the two Voyager spacecraft have made breakthrough discoveries that keep Cummings engaged.
  • Cummings thinks they will continue traveling for a billion years.

Insider Today

The twin Voyager spacecraft launched almost five decades ago, and there's no reason they shouldn't keep going for a billion years, one of its scientists, Alan Cummings told Business Insider.

Cummings started working on the Voyager mission when he was a graduate student at Caltech in 1973, about four years before the two spacecraft launched.

Now a senior research scientist at Caltech, Cummings has seen the program dwindle from over 300 people to fewer than a dozen.

Voyagers 1 and 2 have traveled over 10 billion miles into space, further than any human-made object. Cummings said being a part of this historic mission for so many decades has been the backbone of his career.

"The Hubble Telescope is a great mission," he said. " JWST is a great mission, but I think Voyager's in that kind of category."

Voyagers' endurance

The Voyager mission has been gathering groundbreaking data and photos since the beginning.

The first time Cummings saw Jupiter's moon Io in 1979, for example, he thought it was a joke. "It looked like a poorly made pizza," he said.

Its colorful, volcano-covered surface looked so different from Earth's gray, pockmarked moon . "This can't be real," he said, "and it was real."

The Voyagers offered us a new perspective on our outer solar system, unlike anything we could have imagined.

They discovered Saturn wasn't the only planet with rings — Jupiter has them too. They revealed new moons around Jupiter and Saturn.

In total, the two spacecraft snapped 67,000 images of our solar system, the final of which was the "pale blue dot" photo made famous by Carl Sagan who said:

"To my mind, there is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world."

"It rewrote the textbooks," Cummings said of the mission.

Both Voyagers were initially planned as five-year missions, but Cummings said, from the beginning, he expected the spacecraft to last at least 30 to 40 years.

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"A remarkable engineering team has kept this thing going," Cummings said.

Now, as the two spacecraft approach their 50th anniversaries, they're running low on fuel.

Engineers have had to shut down different instruments to keep them going and the data coming in.

Cummings said once the Voyagers lose power and communication, they'll continue traveling. "I think it's going to go for a billion years," he said. "There's nothing to stop it."

Joining Voyager

If it weren't for an unfortunate accident, Cummings may never have joined the Voyager mission.

Before Voyager, Cummings was part of an experiment to measure cosmic rays using a balloon.

For several summers, he had released the balloon from northern Manitoba, Canada.

But during its final flight, the balloon didn't descend as expected and ended up over Russia, instead.

By the time Cummings got to Russia, the instrument was destroyed.

"It was very fortunate for me," he said, because he was able to then join the Voyager mission.

He put his cosmic ray experience to use, working on telescopes for the mission's experiments.

"I have my little initials scratched on one of those" telescopes he said, "so I guess I'm going to be immortal."

Interstellar space

Cummings has worked on other projects over the decades, but Voyagers' continual transmission of new data has kept him excited and involved.

"There's always some new phenomenon that you see," he said.

In fact, Voyager's data has become increasingly more interesting to Cummings in recent years because the two spacecraft are now in interstellar space , the region of space beyond our sun's influence.

After passing by the four giant planets of Jupiter, Saturn, Neptune, and Uranus, many of the instruments were still in working order. So, the spacecraft transitioned to an interstellar mission.

In 2012, Voyager 1 became the first human-made spacecraft to enter interstellar space and Voyager 2 followed six years later.

"That is really what I was most interested in anyway," Cummings said, since cosmic rays are his field of expertise and in interstellar space, those rays aren't disrupted by the sun, Earth, and other obstructions in our solar system.

Voyager is "making its most interesting measurements in some ways right now," he said.

Currently, Voyager 1 is having issues with one of its onboard computers that could compromise the mission.

Cummings hopes the Voyagers can hang on a little longer, especially since interstellar space is a long way off for any other spacecraft.

Watch: NASA released this 5-year time-lapse of Mars from its Curiosity rover — and the footage looks amazing

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Engineers Investigating NASA’s Voyager 1 Telemetry Data

voyager 1 most recent photo

NASA’s Voyager 1 spacecraft, shown in this illustration, has been exploring our solar system since 1977, along with its twin, Voyager 2.

While the spacecraft continues to return science data and otherwise operate as normal, the mission team is searching for the source of a system data issue.

The engineering team with NASA’s Voyager 1 spacecraft is trying to solve a mystery: The interstellar explorer is operating normally, receiving and executing commands from Earth, along with gathering and returning science data. But readouts from the probe’s attitude articulation and control system (AACS) don’t reflect what’s actually happening onboard.

The AACS controls the 45-year-old spacecraft’s orientation. Among other tasks, it keeps Voyager 1’s high-gain antenna pointed precisely at Earth, enabling it to send data home. All signs suggest the AACS is still working, but the telemetry data it’s returning is invalid. For instance, the data may appear to be randomly generated, or does not reflect any possible state the AACS could be in.

The issue hasn’t triggered any onboard fault protection systems, which are designed to put the spacecraft into “safe mode” – a state where only essential operations are carried out, giving engineers time to diagnose an issue. Voyager 1’s signal hasn’t weakened, either, which suggests the high-gain antenna remains in its prescribed orientation with Earth.

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The team will continue to monitor the signal closely as they continue to determine whether the invalid data is coming directly from the AACS or another system involved in producing and sending telemetry data. Until the nature of the issue is better understood, the team cannot anticipate whether this might affect how long the spacecraft can collect and transmit science data.

Voyager 1 is currently 14.5 billion miles (23.3 billion kilometers) from Earth, and it takes light 20 hours and 33 minutes to travel that difference. That means it takes roughly two days to send a message to Voyager 1 and get a response – a delay the mission team is well accustomed to.

“A mystery like this is sort of par for the course at this stage of the Voyager mission,” said Suzanne Dodd, project manager for Voyager 1 and 2 at NASA’s Jet Propulsion Laboratory in Southern California. “The spacecraft are both almost 45 years old, which is far beyond what the mission planners anticipated. We’re also in interstellar space – a high-radiation environment that no spacecraft have flown in before. So there are some big challenges for the engineering team. But I think if there’s a way to solve this issue with the AACS, our team will find it.”

It’s possible the team may not find the source of the anomaly and will instead adapt to it, Dodd said. If they do find the source, they may be able to solve the issue through software changes or potentially by using one of the spacecraft’s redundant hardware systems.

It wouldn’t be the first time the Voyager team has relied on backup hardware: In 2017, Voyager 1’s primary thrusters showed signs of degradation, so engineers switched to another set of thrusters that had originally been used during the spacecraft’s planetary encounters . Those thrusters worked, despite having been unused for 37 years.

Voyager 1’s twin, Voyager 2 (currently 12.1 billion miles, or 19.5 billion kilometers, from Earth), continues to operate normally.

Launched in 1977, both Voyagers have operated far longer than mission planners expected, and are the only spacecraft to collect data in interstellar space. The information they provide from this region has helped drive a deeper understanding of the heliosphere, the diffuse barrier the Sun creates around the planets in our solar system.

Each spacecraft produces about 4 fewer watts of electrical power a year, limiting the number of systems the craft can run. The mission engineering team has switched off various subsystems and heaters in order to reserve power for science instruments and critical systems. No science instruments have been turned off yet as a result of the diminishing power, and the Voyager team is working to keep the two spacecraft operating and returning unique science beyond 2025.

While the engineers continue to work at solving the mystery that Voyager 1 has presented them, the mission’s scientists will continue to make the most of the data coming down from the spacecraft’s unique vantage point.

More About the Mission

The Voyager spacecraft were built by JPL, which continues to operate both. JPL is a division of Caltech in Pasadena. The Voyager missions are a part of the NASA Heliophysics System Observatory, sponsored by the Heliophysics Division of the Science Mission Directorate in Washington.

For more information about the Voyager spacecraft, visit:

https://www.nasa.gov/voyager

News Media Contact

Calla Cofield

Jet Propulsion Laboratory, Pasadena, Calif.

626-808-2469

[email protected]

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Let’s take a moment to look at the mesmerizing images from Voyager 1

“The cosmos is within us. We are made of star-stuff.” —Carl Sagan

In 1977, NASA launched two Voyager probes, equipped with golden records describing human accomplishment, on a mission to explore the farthest reaches of the solar system. Each record catalogued our music, our greetings, our art and photography.

Forty years later, both spacecrafts are still hurtling through space , exploring parts of the universe where nothing from Earth has visited before. Voyager 1 is now in interstellar space, 13 billion miles away from Earth. Voyager 2 is passing through the heliosheath, the outermost layer of the heliosphere, before it, too, reaches interstellar space.

Last week, in an amazing feat of engineering, NASA engineers turned on Voyager 1’s backup thrusters after they’d been dormant for 37 years. The thrusters will help reorient the spacecraft’s antenna back to Earth, so we can receive its signal for just a little longer.

It’s a fine moment to reflect on the incredible images Voyager 1 has sent back over its lifetime. The probe gave us the first “ portrait ” of our solar system, and memorably mesmerizing shots of Saturn and Jupiter.

Our crescent Earth and moon in the first picture of its kind ever captured by a spacecraft. Taken on Sept. 18, 1977, 7 million miles (12 million km) away from Earth.

Watch NASA’s moving compilation of images from both Voyagers below:

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Voyager 1 is 15 billion miles from home and broken. Here's how NASA is trying to fix it.

A scrambled computer signal may be the key that helps NASA engineers resume data transmission from the distant Voyager 1, a spacecraft that was launched in 1977 and now, 15 billion miles from home, is the farthest a human-made object has traveled from Earth.

Voyager 1 – and its sister craft, Voyager 2 – are robotic space probes that became the first spacecraft to leave our solar system and plunge into interstellar space, 11 billion miles from the sun.

They were designed to last five years , but have become the longest-operating spacecraft in history. Both carry gold-plated copper discs containing sounds and images from Earth, contents that were chosen by a team headed by celebrity astronomer Carl Sagan .

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 is sending to Earth, making it unreadable , arstechnica.com reported.

Voyager 1 can receive communications from Earth. It is still transmitting, but its returning signals have been replaced “with a monotonous dial tone ,” according to space.com.

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What's the problem with Voyager 1?

NASA and Jet Propulsion Laboratory engineers traced the problem to one of Voyager’s three onboard computers, one called a Flight Data System. The system collects information, including:

◾ Data from science instruments that monitor cosmic rays, solar wind particles, the sun's magnetic field, and other phenomena.

◾ Engineering data on spacecraft operating systems.

The Flight Data System gives that information to the spacecraft’s Telemetry Modulation Unit. The The unit converts the data to binary code – consisting of zeros and ones, the simplest form of computer code – then transmits that code to Earth, using Voyager's 12-foot antenna dish.

The data is received by NASA's Deep Space Network , giant 112-foot radio antennas placed around the world. The network handles space communications from several missions.

In November, the Telemetry Modulation Unit transmissions became a repeating pattern of zeros and ones " as if it were stuck ," NASA said.

Engineers restarted the Flight Data System in December, but that failed to fix the problem.

Voyager 1 is far away – and it's getting old

Voyager 1 has been in space for more than 46 years. Attempts to fix problems aboard the spacecraft often mean "consulting original, decades-old documents written by engineers who didn’t anticipate the issues that are arising today," NASA says. 

Engineers have consulted archived documents to find solutions to other Voyager problems in the past, wired.com says.

Engineers need time to understand how new commands will affect the spacecraft and to avoid unintended consequences. It's a complicated, time-consuming process.

A long time lag makes solving the problem more difficult. Voyager is moving at about 38,000 mph. It takes 22.5 hours for an Earth radio signal to reach Voyager and another 22.5 hours for the spacecraft’s reply to reach antenna networks on Earth.

That means engineers must wait 45 hours to get a response and learn if a command has been successful.

What was the key computer signal?

The key signal was received after engineers "poked" the spacecraft.

◾ March 1: Teams send a command known as a “poke” to Voyager. In essence, the poke tells the Flight Data System to try different sequences in its software program, in the hope a corrupted portion can be found and bypassed.

◾ March 3: Engineers receive a new signal from Voyager that is different from both the unreadable dial tone and the spacecraft’s original transmission stream.

◾ March 7: Engineers begin decoding the signal.

◾ March 10: A Deep Space Network engineer finishes decoding the new signal and finds it contains a readout of the spacecraft’s entire Flight Data System memory. That includes instructions for the spacecraft when it receives commands or when its operational status changes. 

The memory also contains science or engineering data for downlink, NASA says.

What happens next?

Engineers will compare the readout to those transmitted before the problem started. They hope to find differences that will help diagnose the problem.

Voyager 2 was launched first on Aug. 20, 1977. Voyager 1 was launched Sept. 5, 1977. It was put on a faster, shorter trajectory, which took it to interstellar space ahead of Voyager 2.

The Voyagers are the only spacecraft in the interstellar void. NASA's New Horizons probe , launched Jan. 19, 2006, flew past Pluto in 2015 and is expected to enter interstellar space in the 2040s.

NASA's Voyager 1 sends readable message to Earth after 4 nail-biting months of gibberish

After four months of being unable to detect comprehensible data from the Voyager 1 spacecraft, NASA scientists have had fresh luck after sending a "poke."

Artists conception of Voyager 1 spacecraft entering interstellar space

After a nail-biting four months, NASA has finally received a comprehensible signal from its Voyager 1 spacecraft. 

Since November 2023, the almost-50-year-old spacecraft has been experiencing trouble with its onboard computers. Although Voyager 1, one of NASA's longest-lived space missions, has been sending a steady radio signal to Earth, it hasn't contained any usable data , which has perplexed scientists. 

Now, in response to a command prompt, or "poke," sent from Earth on March 1, NASA has received a new signal from Voyager 1 that engineers have been able to decode. Mission scientists hope this information may help them explain the spacecraft's recent communication problems. 

"The source of the issue appears to be with one of three onboard computers, the flight data subsystem (FDS), which is responsible for packaging the science and engineering data before it's sent to Earth by the telemetry modulation unit," NASA said in a blog post Wednesday (March 13) .

Related: NASA's 46-year-old Voyager 1 probe is no longer transmitting data

On March 1, as part of efforts to find a solution to Voyager 1's computer issues, NASA sent a command to the FDS on the spacecraft, instructing it to use different sequences in its software package, which would effectively mean skirting around any data that may be corrupted. 

Voyager 1 is more than 15 billion miles (24 billion kilometers) from Earth. This means any radio signals sent from our planet take 22.5 hours to reach the spacecraft, with any response taking the same time to be picked up by antennas on Earth. 

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On March 3, NASA detected activity from one section of the FDS that differed from the "unreadable data stream" they'd previously been receiving. Four days later, engineers started the heavy task of trying to decode this signal. By March 10, the team discovered that the signal contained a readout of the entire FDS memory. This included the instructions for what the FDS needed to do, any values in its code that can be changed depending on commands from NASA or the spacecraft's status, and downloadable science or engineering data.  

Voyager 1 has ventured farther from Earth than any other human-made object . It was launched in 1977, within weeks of its twin spacecraft , Voyager 2. The initial aim of the mission was to explore Jupiter and Saturn . Yet after almost five decades, and with countless discoveries under their belts, the mission continues beyond the boundaries of the solar system . 

— NASA hears 'heartbeat' signal from Voyager 2 probe a week after losing contact

— Historic space photo of the week: Voyager 2 spies a storm on Saturn 42 years ago

— NASA reestablishes full contact with Voyager 2 probe after nail-biting 2-week blackout

NASA scientists will now "compare this readout to the one that came down before the issue arose and look for discrepancies in the code and the variables to potentially find the source of the ongoing issue," they said in the blog post.  

However, NASA stressed that it will take time to determine if any of the insights gained from this new signal can be used to solve Voyager 1's long-standing communication issues. 

Emily Cooke

Emily is a health news writer based in London, United Kingdom. She holds a bachelor's degree in biology from Durham University and a master's degree in clinical and therapeutic neuroscience from Oxford University. She has worked in science communication, medical writing and as a local news reporter while undertaking journalism training. In 2018, she was named one of MHP Communications' 30 journalists to watch under 30. ( [email protected]

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  • Bruzote I have an inside source who says the message said, "Be sure to drink your Ovaltine." Reply
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Voyager 1 starts making sense again after months of babble

Veteran spacecraft shows signs of sanity with poke from engineers.

Engineers are hopeful the veteran spacecraft Voyager 1 has turned a corner after spending the past three months spouting gibberish at controllers.

On March 1 , the Voyager team sent a command, dubbed a "poke," to get the probe's Flight Data System (FDS) to try some other sequences in its software in the hope of circumventing whatever had become corrupted.

Readers of a certain vintage will doubtless have memories of poke sheets for various 1980s games. Not that this hack ever used a poke to get infinite lives in Jet Set Willy , of course.

While Voyager 1's lifespan is not infinite, it has endured far longer than anticipated and might be about to dodge yet another bullet. On March 3, the mission team saw something different in the stream of data returned from the spacecraft, which had been unreadable since December.

voyager 1 most recent photo

An engineer with the Deep Space Network (DSN) was able to decode it, and by March 10, the team determined that it contained a complete memory dump from the FDS.

The FDS memory read-out contains its code, variables, and science and engineering data for downlink.

Prior to NASA's announcement, Dr Suzanne Dodd, project manager for the Voyager Interstellar Mission, said in a Pasadena Star-News report that the data being transmitted from the probe was "not exactly what we would expect, but they do look like something that can show us that the FDS is at least partially working."

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Dodd was referring to the ones and zeroes streaming from the spacecraft. Previously, the probe's telemetry modulation unit (TMU) had begun in mid-December transmitting a repeating binary pattern as though it was somehow stuck. Engineers reckoned the issue was somewhere within the FDS.

The next step is to study the memory read-out and compare it to one transmitted before the problem arose. A solution to the issue could then be devised.

One of the original Voyager scientists, Garry Hunt, told The Register that engineers at JPL were determined to get communications with the stricken probe working again: "This requires both skills and patience with the long time between communication instructions and response."

The time lag is a problem. A command from Earth takes 22.5 hours to reach the probe, and the same period is needed again for a response. This means a 45-hour wait to see what a given command might have done.

The availability of skills is also an issue. Many of the engineers who worked on the project - Voyager 1 launched in 1977 - are no longer around, and the team that remains is faced with trawling through reams of decades-old documents to deal with unanticipated issues arising today. ®

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  2. Voyager 1 Spacecraft Enters New Region of Solar System

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  4. In the Emptiness of Space 14 Billion Miles Away, Voyager I Detects “Hum

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  5. Voyager mission: 10 billion miles and counting

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  6. THE ASTOUNDING JOURNEY OF VOYAGER 1

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  1. VOYAGER 1 और VOYAGER 2 सैटेलाइट्स की अनोखी खोजें

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  4. Voyager 1 Breakthrough

  5. Joe Rogan Warns Us That Voyager 1 Made An Encounter In Deep Space

  6. 6 MINUTES AGO: Voyager 1 Just Sent Out A TERRIFYING Message From Space

COMMENTS

  1. Voyager

    They took more than 33,000 pictures of Jupiter and its five major satellites. Saturn The Voyager 1 and 2 Saturn encounters occurred nine months apart, in November 1980 and August 1981. Voyager 1 is leaving the solar system. Voyager 2 completed its encounter with Uranus in January 1986 and with Neptune in August 1989, and is now also en route ...

  2. Voyager

    Each Voyager space probe carries a gold-plated audio-visual disc in the event that the spacecraft is ever found by intelligent life forms from other planetary systems. Examine the images and sounds of planet earth. The Voyager 1 and 2 spacecraft explored Jupiter, Saturn, Uranus and Neptune before starting their journey toward interstellar space.

  3. NASA Voyager Probes: 18 Best Pictures As 46-Year Journey Nears End

    NASA's Voyager probes have been traveling through space for nearly 46 years. Here are 18 groundbreaking photos from their incredible mission. Marianne Guenot. Updated. Aug 1, 2023, 4:01 AM PDT ...

  4. Images taken by the Voyager Mission

    Early Voyager 1 Images of Jupiter Full Resolution: TIFF (491.5 kB) JPEG (21.78 kB) 1996-09-26: Jupiter: Voyager: Imaging Science Subsystem: 400x400x3: PIA00029: First Close-up Image of Jupiter from Voyager ...

  5. Voyager 1

    Voyager 1 was the first spacecraft to cross the heliosphere, the boundary where the influences outside our solar system are stronger than those from our Sun. ... 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 ...

  6. Voyager Image Gallery

    This is an image of the planet Uranus taken by the spacecraft Voyager 2 in 1986. Credit: NASA/JPL-Caltech. Full Image Details. This image, taken by NASA's Voyager 2 early in the morning of Aug. 23, 1989, is a false color image of Triton, Neptune's largest satellite; mottling in the bright southern hemisphere is present.

  7. Pale Blue Dot at 30: Voyager 1's iconic photo of Earth from space

    On Feb. 14, 1990, NASA's Voyager 1 probe snapped a photo of Earth from 3.7 billion miles (6 billion kilometers) away. The image shows our home planet as it truly is — a tiny, lonely outpost of ...

  8. Images taken by the Voyager 1 Spacecraft

    Voyager 1 Perspective for Family Portrait Full Resolution: TIFF (2.496 MB) JPEG (336.9 kB) 2021-05-11: Voyager: 1241x427x3: PIA24572: Weak and Strong Plasma Oscillation Signals Full Resolution: TIFF (960.8 kB) JPEG (80.75 kB) 2021-11-30: Europa: Galileo Voyager: 1100x600x3: PIA24895: Three Views of Europa Full Resolution: ...

  9. Mission Monday

    August 31, 2020. Space Center Houston. On Sept. 5, 1977, Voyager 1 launched on a decades-long mission to study the outer solar system. Less than two weeks later, Voyager 1 achieved its first milestone - capturing the first image taken by a spacecraft to include both the Earth and Moon in the same frame. It's been 43 years since Voyager 1 ...

  10. Voyager 1 Sees the Great Red Spot

    Launched in 1977, the twin Voyager probes are NASA's longest-operating mission and the only spacecraft ever to explore interstellar space. 45 years on, Voyager 1 and 2 continue to provide us with observations of the farthest reaches of space.. Our Voyager 1 spacecraft zoomed toward Jupiter in January and February 1979, capturing hundreds of images of Jupiter during its approach, including ...

  11. NASA's Voyager 1 reaches outskirts of the solar system (photos)

    Voyager 1 captured this iconic image of a crescent-shaped Earth and moon on September 18, 1977. This was the first time Earth and its moon were photographed together in a single image, captured by ...

  12. NASA to Power Down Voyager Probes: Here Are Their Best Space Photos

    Matt Growcoot. The Voyager Space Probes — the most distant cameras in the universe — are being powered down after 44 years of interstellar travel. Voyager 1 and Voyager 2 have made it deeper ...

  13. New Horizons snaps photo of Voyager 1 from 11 billion miles away

    The New Horizons photo of Voyager 1 (yellow circle), set against a backdrop of stars and galaxies. NASA/Johns Hopkins APL/Southwest Research Institute. In this photo, the two spacecraft are ...

  14. The best space pictures from the Voyager 1 and 2 missions

    Image: NASA / JPL / Ted Stryk. Saturn as seen by Voyager 1 The last picture from Voyager 1's approach to Saturn in which the entire planet and ring system can be seen in a single frame. Image: NASA/JPL/Björn Jónsson. Voyager 2's best view of Enceladus This was the Voyager mission's best view of Enceladus, captured by Voyager 2 on August 26 ...

  15. NSSDCA Photo Gallery: Voyager Index

    NSSDCA Photo Gallery: Voyager Index - An index of pages in the NSSDCA Photo Gallery which contain images produced by the Voyager 1 and 2 spacecraft ... NSSDCA Photo Gallery: Voyager Index. This page is provided as an index to the many images which the Voyager 1 and 2 spacecraft have taken of solar system objects. These images appear on the ...

  16. Voyager

    NASA Voyager Statement about Competing Models to Explain Recent Spacecraft Data ... Voyager 1, already the most distant human-made object in the cosmos, reaches 100 astronomical units from the sun on Tuesday. ... Voyager 1 to Take Pictures of Solar System Planets NASA's Voyager 1 spacecraft, having completed its mission along with Voyager 2 to ...

  17. Alan Cummings Has Worked on the Voyager Mission for Over 50 Years

    The Voyager mission has been gathering groundbreaking data and photos since the beginning. The first time Cummings saw Jupiter's moon Io in 1979, for example, he thought it was a joke. "It looked ...

  18. Voyager 1 to Take Pictures of Solar System Planets

    NASA's Voyager 1 spacecraft, having completed its mission along with Voyager 2 to explore the outer planets, will use its cameras February 13-14 to take an unprecedented family portrait of most of the planets in our solar system. The collection of images will be from a unique point-of-view -- looking down on the solar system from a position 32 ...

  19. Engineers Investigating NASA's Voyager 1 Telemetry Data

    Voyager 1 is currently 14.5 billion miles (23.3 billion kilometers) from Earth, and it takes light 20 hours and 33 minutes to travel that difference. That means it takes roughly two days to send a message to Voyager 1 and get a response - a delay the mission team is well accustomed to.

  20. NASA Voyager 1 photos: Amazing images from the space probe ...

    Our crescent Earth and moon in the first picture of its kind ever captured by a spacecraft. Taken on Sept. 18, 1977, 7 million miles (12 million km) away from Earth. Voyager 1's closest approach ...

  21. Voyager 1 Image of Jupiter

    Jul 13, 2015. Image Article. First close-up view of Jupiter from Voyager 1. First close-up view of Jupiter from Voyager 1. Voyager 1's closest approach to Jupiter occurred March 5, 1979.

  22. NASA works to fix Voyager 1 radio link from 15 billion miles away

    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 ...

  23. NASA's Voyager 1 sends readable message to Earth after 4 nail-biting

    Voyager 1 has ventured farther from Earth than any other human-made object. It was launched in 1977, within weeks of its twin spacecraft , Voyager 2. The initial aim of the mission was to explore ...

  24. Voyager 1 sends back surprising response after 'poke' from NASA

    Meanwhile, Voyager 2 has traveled more than 12.6 billion miles (20.3 billion kilometers) from our planet. Both are in interstellar space and are the only spacecraft ever to operate beyond the ...

  25. Voyager

    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 year.

  26. Voyager 1 starts making sense again after months of babble

    Engineers are hopeful that the veteran spacecraft Voyager 1 might have turned a corner after spending the last three months spouting gibberish at controllers. On March 1 , the Voyager team sent a command, dubbed a "poke," to get the probe's Flight Data System (FDS) to try some other sequences in its software in the hope of circumventing ...