NASA's Bold Voyager Power Gambit Could Keep Spacecraft Alive Through 2030s

The High-Stakes Engineering Gamble

Nearly five decades after their launch, NASA's Voyager spacecraft, nearly 50 years in deep space, might continue their mission well into the 2030s with a new engineering maneuver that could extend their power . This ambitious plan, dubbed "the Big Bang," represents one of the most daring power conservation strategies in spaceflight history. The plan involves turning off three devices that have been used to prevent the spacecraft's thruster fuel lines from freezing. By replacing them with three new devices, engineers hope to conserve almost 10 watts of power, which is critical as the spacecraft's power supply continues to shrink .

The team will implement the Big Bang on Voyager 2 first, which has a little more power to spare and is closer to Earth, making it the safer test subject. Tests are planned for May and June 2026 . The stakes couldn't be higher: If the fuel lines freeze, the probes can no longer point their antennas at Earth . Success could mean years of additional scientific discoveries from the edge of our solar system.

Racing Against Time and Physics

Launched in 1977, Voyagers 1 and 2 rely on a radioisotope power system that generates electricity from the heat of decaying plutonium. Both lose about 4 watts of power each year . The probes now operate on razor-thin power margins, with five to six watts of power margin available on each spacecraft . To put this in perspective, it takes about 200 watts, approximately, to run the transmitter on the spacecraft, to be able to send signals back to Earth .

Engineers have already made difficult sacrifices to keep the mission alive. Mission engineers at NASA's Jet Propulsion Laboratory in Southern California turned off the cosmic ray subsystem experiment aboard Voyager 1 on Feb. 25 and will shut off Voyager 2's low-energy charged particle instrument on March 24 . Despite these losses, three science instruments will continue to operate on each spacecraft .

The Ultimate Stretch Goal

The engineering team's ambitions extend far beyond basic survival. The team's ultimate stretch goal is for each spacecraft to reach 200 astronomical units (AU) from Earth, a milestone that could be achieved by 2035 . Currently, Voyager 1 is at 169.8 AU and Voyager 2 is at 143.1 AU . Each astronomical unit represents the distance from Earth to the Sun—about 93 million miles.

With the implementation of this power conservation plan, engineers believe the two probes could have enough electricity to continue operating with at least one science instrument into the 2030s . Project manager Suzanne Dodd remains cautiously optimistic: "If we got really lucky, maybe doing some operating below some thresholds, we might be able to go out to the 2030s" .

Legacy Beyond the Solar System

The Voyagers represent humanity's most distant ambassadors, with Voyager 1 is more than 15 billion miles (25 billion kilometers) away. Voyager 2 is over 13 billion miles (21 billion kilometers) from Earth . Both spacecraft are the only spacecraft ever to operate outside the heliosphere, the protective bubble of particles and magnetic fields generated by the Sun .

Even when their power finally fails, the Voyagers will continue their cosmic journey. Voyager 1 is currently moving at roughly 38,000 mph. In about 40,000 years, it will pass within 1.6 light-years of the star AC+79 3888 . The spacecraft carry humanity's Golden Records—messages for any extraterrestrial life that might encounter them—ensuring their mission transcends the limitations of electrical power and enters the realm of eternal exploration.