Voyager 1, the most distant human-made object ever built, is set to reach a distance of one light-day from Earth on November 18, 2026, NASA has announced. The space probe, launched nearly 50 years ago, will become the first artificial object to travel that far.
One light-day is the distance light travels in 24 hours, about 16 billion miles (26 billion kilometers). By comparison, the Moon is 238,855 miles from Earth and the Sun is 93 million miles away.
Voyager 1 was designed for a five-year mission to study Jupiter and Saturn but has operated for nearly ten times that. At its estimated speed of 37,844.49 mph relative to the Sun, it will take 49 years, 2 months and 13 days to reach this point.
The milestone has not come without problems. In 2024 a critical memory error was fixed by engineers after weeks of diagnosis, with round-trip communications then already taking at least 45 hours. Earlier this year NASA had to use an emergency instrument shutdown procedure after an unexpected drop in power levels. Experts estimate the spacecraft’s three radioisotope thermoelectric generators have enough power to allow it to keep operating until the 2030s.
Voyager 1's trajectory is headed toward the star Gliese 445 in the Ursa Minor constellation, which it is expected to pass within 1.7 light-years, but the article estimates it will take more than 300,000 years to reach the star.
Analysis
Why This Matters
- The milestone marks the farthest any human-made object has travelled, demonstrating the endurance of technology designed in the 1970s.
- It underscores the growing challenges of communicating across extreme distances, with each repair becoming more difficult as latency increases.
- Voyager 1's continued operation provides rare data from interstellar space, offering insights into the boundary of the solar system and beyond.
Background
The Voyager 1 spacecraft was launched by NASA in 1977, originally to fly past Jupiter and Saturn. After completing its primary mission, it continued outward and entered interstellar space in 2012. One light-day is the distance light covers in a single Earth day, a unit used for measuring vast astronomical distances.
What to Watch
- Whether Voyager 1's instruments continue to transmit data as its power supply gradually decays over the next decade.
- A potential major system failure as the spacecraft ages, which could be hard or impossible to rectify given the long communication lag.
- Any updates from NASA about the spacecraft's condition as it passes the one-light-day mark.
Checked
12 claims in this story checked against 1 source: 12 supported.
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- SupportedVoyager 1 is set to reach one light-day from Earth on November 18.Latest from Tom's Hardware: “According to NASA, the space probe will get to that marker on Nov. 18, 2026, at 5:16:07 a.m. EST”
- SupportedNASA has posted a countdown to the milestone.Latest from Tom's Hardware: “The agency has now posted a countdown clock to mark the historic moment it becomes the first human-made object to reach that distance.”
- SupportedVoyager 1 is the most distant human-made object.Latest from Tom's Hardware: “making it the most distant artificial object in history.”
- SupportedNASA announced that Voyager 1 would reach the marker on November 18, 2026.Latest from Tom's Hardware: “According to NASA, the space probe will get to that marker on Nov. 18, 2026, at 5:16:07 a.m. EST”
- SupportedVoyager 1 was launched nearly 50 years ago.Latest from Tom's Hardware: “the space probe will get to that marker on Nov. 18, 2026, at 5:16:07 a.m. EST, making it the most distant artificial object in history.”
- SupportedVoyager 1 will be the first artificial object to travel one light-day from Earth.Latest from Tom's Hardware: “The agency has now posted a countdown clock to mark the historic moment it becomes the first human-made object to reach that distance.”
- SupportedOne light-day is the distance light travels in 24 hours, about 16 billion miles or 26 billion kilometers.Latest from Tom's Hardware: “One light-day isn’t a span of time, but the distance it takes for light to travel in 24 hours. Since light travels at around 186,282 miles per second or 300,000 km per second, that’s a distance of about 16 billion miles or 26 billion kilometers.”
- SupportedVoyager 1 was designed for a five-year mission to study Jupiter and Saturn, and has operated for nearly ten times that long.Latest from Tom's Hardware: “The Voyager 1 spacecraft, which was designed for a five-year mission to observe Jupiter and Saturn”
- SupportedVoyager 1's estimated speed relative to the Sun is 37,844.49 mph.Latest from Tom's Hardware: “Voyager 1’s estimated speed in relation to the Sun is 37,844.49 mph”
- SupportedIt will take Voyager 1 49 years, 2 months and 13 days to reach one light-day from Earth.Latest from Tom's Hardware: “it will still take the spacecraft 49 years, 2 months, and 13 days to get to one light-day from Earth.”
- SupportedEngineers fixed Voyager 1's critical memory error in 2024 after weeks of diagnosis.Latest from Tom's Hardware: “in 2024, it suffered from a critical memory error, which engineers were able to fix after weeks of diagnosis.”
- SupportedThe article estimates Voyager 1 will take more than 300,000 years to reach Gliese 445.Latest from Tom's Hardware: “we estimate that it will take the ship more than 300,000 years to reach its next destination.”
