NASA’s Voyager 1 and Voyager 2, launched in 1977, continue their historic mission far past its four-year plan, visiting all four outer planets and now venturing in interstellar space while sending data back to Earth. Even as aging power limits require hardware tweaks to extend life, the probes remain functional and keep delivering space measurements, carrying the Golden Record and providing the famous 1990 pale blue dot Earth image as they drift farther from home.
NASA completed a 'Big Bang' upgrade on Voyager 2 to save about 10 watts of power by reconfiguring instruments and heat distribution, extending its mission by 2–3 years; plans are underway to apply the same upgrade to Voyager 1 in the coming months, which could keep both spacecraft operational into the 2030s as their plutonium power sources gradually fade while they continue their vast journeys through the outer solar system.
NASA beamed a new software update—nicknamed 'Big Bang'—to Voyager 2 from about 13.3 billion miles away, turning off some high‑power devices and swapping them for lower‑power options to conserve energy. The change should keep the remaining three instruments operational for at least another year as the RTG power slowly declines, and NASA plans to apply the same update to Voyager 1.
NASA has extended Voyager 2’s lifespan by about one year using a software update nicknamed “Big Bang.” By turning off certain high-power instruments and swapping in lower-power equivalents, the spacecraft conserves the dwindling power from its plutonium RTG (losing roughly 4 watts per year), allowing its three remaining instruments to continue science work roughly 13 billion miles from Earth. Voyager 2, launched in 1977, visited the outer planets, reached interstellar space in 2018, and now transmits data about the heliosphere as its energy budget tightens.
NASA’s Voyager 2 gained at least a year of extra operational life not by touching the spacecraft, but via a coordinated ground-based power swap called the “Big Bang” that swaps in lower-power components while keeping critical heaters and instruments online. With a roughly 39-hour command cycle (about 19.5 hours to reach the probe and the same back), engineers plan far in advance, since there’s no live troubleshooting. The change reduces power demand from aging RTGs and preserves science measurements from three active instruments in interstellar space; Voyager 1 will receive a similar upgrade in the coming months.
NASA’s Golden Record on Voyager 1 carries a greeting spoken by six-year-old Nick Sagan: “Hello from the children of planet Earth.” The line, chosen for the record assembled by Carl Sagan and colleagues, is part of a 55-language message meant as a message in a bottle for any potential finders. Voyager 1, launched in 1977, has since reached interstellar space, turning a child’s voice into a lasting trace of humanity as Nick and his father reflect on immortality and legacy.
Voyager 1 crossed the Sun’s heliopause into interstellar space in 2012, becoming the first human-made object in interstellar space, but it remains gravitationally bound to the Sun. Estimates place the Oort Cloud’s inner edge at about 2,000–5,000 AU and its outer edge at 10,000–100,000 AU, meaning the probe will take roughly 300 years to reach the Oort Cloud and up to 30,000 years to pass beyond it. The boundary it has crossed is about the solar wind boundary rather than the solar system’s final edge, and its power is fading as it continues the journey.
NASA’s Voyager 1 could gain extra years of operation thanks to a “big bang” power-saving maneuver tested on Voyager 2, which toggles off two heaters and an old data recorder while turning on two other heaters and a propulsion unit. The switch saves about 10 watts per year from the aging RTG, potentially allowing LECP (the Low-energy Charged Particles instrument) to run again and keeping two remaining instruments—plasma-wave and magnetic-field sensors—online as it drifts farther into interstellar space. If all goes well, Voyager 1 could approach one light-day from Earth this November, reach NASA’s projected 50th anniversary in 2027, and possibly extend operations into the 2030s.
NASA’s Big Bang power-saving maneuver on Voyager 2, which temporarily shuts off high-power instruments in favor of lower-power ones, should extend its science operations by about a year. Voyager 1, currently in worse shape for power, is slated for a similar energy-saving move in the coming months as both probes head toward their 50th anniversaries (launched in 1977).
NASA engineers at JPL have extended Voyager 2’s life by implementing a 'Big Bang' power-saving plan that turns off nonessential instruments to conserve dwindling plutonium-powered energy, leaving only three sensors active and buying about a year of additional flight in interstellar space; the team may apply the same strategy to Voyager 1.
NASA's Jet Propulsion Laboratory's 'Big Bang' power-management fix on Voyager 2 disables two heaters and a heat-dissipating device while switching on lower-power components, plus a software update so safe-mode includes these devices. The result is about a year of extended data from Voyager 2's three remaining instruments; a similar plan is in place for Voyager 1 with thermal tests by late August. Launched in 1977 and powered by RTGs, both probes remain the farthest active spacecraft from Earth as they traverse interstellar space.
Launched in 1977, Voyager 1 still transmits data from beyond the Sun’s wind using six small, 1970s-era computers with about 32,000 words of memory (roughly 68 kilobytes). Its mission survives because it was designed to be understandable, redundant and conservative, not powerful. Power from its plutonium RTGs declines by ~4 watts per year, so engineers have shut down instruments and trimmed systems; currently it relies on two active instruments and a ground-based command/control system. Commands take about 23 hours to reach Voyager and replies take a similar time, so every operation is planned as a long-range expedition. The spacecraft’s ground system on Earth does much of the “intelligence,” coordinating attitude, data formatting, and fault responses, while the high-gain antenna and attitude control keep it pointed at Earth. Voyager 1 remains the only probe outside the solar wind bubble, capable of sparse but valuable measurements of the interstellar medium until power or distance eventually limits contact (potentially into the 2030s).
Voyager 1 is controlled by three redundant, 1970s-era computer subsystems with only tens of kilobytes of memory and an effective 8,000-instruction-per-second pace. Yet its longevity is by design: compact, interrupt‑driven software with autonomous fault protection, plus power from decaying plutonium, keeps the probe alive nearly 50 years after launch while Earth handles navigation and data. As of 2026, two science instruments remain active despite energy constraints, illustrating that reliability and longevity trump raw speed in deep-space missions.
Voyager 1 captured Earth as a tiny speck in a color composite—the Pale Blue Dot—on Feb. 14, 1990 as part of NASA’s ‘Family Portrait’ of the solar system. The cameras were shut down 34 minutes later to conserve dwindling power, and they have remained dark even as Voyager continues to relay science data from interstellar space. The moment has become a powerful reminder of Earth’s fragility and our place in the cosmos.
Launched in 1977 for a five-year mission to Jupiter and Saturn, Voyager 1 and 2 are now the only human-made objects confirmed to operate in interstellar space, still receiving commands and sending data decades later. Built with redundant hardware and RTGs, they outlived their design life and crossed the heliopause in 2012 and 2018, respectively. As power fades by about four watts per year, NASA has turned off nonessential systems—most recently Voyager 1’s low-energy charged‑particle instrument in 2026—to extend life. A long-tenured team at JPL and NASA continues to operate the craft, aiming to preserve basic communications into the 2030s, though an unexpected fault could end either mission sooner.
