NASA’s Jet Propulsion Laboratory has found a clever way to conserve power aboard Voyager 2, the space probe cruising well beyond the planets. By shutting down and replacing certain systems with lower-energy options, the team has bought valuable time for this aging spacecraft to keep sending home scientific data.
- Voyager 2 loses about 4 watts of power yearly due to decaying plutonium.
- A ‘Big Bang’ power-swap plan reduces energy use while keeping critical systems warm.
- Saved power allows three scientific instruments to continue working through 2027.
What happened
Voyager 2, launched over four decades ago, relies on decaying plutonium in its radioisotope thermoelectric generators for electricity. As the plutonium supply diminishes, the spacecraft steadily loses power. NASA’s team identified a way to free up power by simultaneously shutting down select components and replacing them with less energy-intensive alternatives, all while maintaining the probe’s temperature to keep it functional.
This careful balancing act, nicknamed the ‘Big Bang’ due to its complexity and risk, was necessary because without it, Voyager 2 would have needed to power down another scientific instrument before the end of 2026. The power freed by these changes allows Voyager 2’s remaining instruments to keep gathering data for at least one more year.
Why it feels good
This resourceful approach showcases how human ingenuity can extend the life of remarkable technology long after its prime. With every watt saved, we preserve the ability to learn more about the outer reaches of our solar system and beyond. It is a bittersweet reminder of how precious these scientific treasures are, given the years and effort involved in sending them so far from home.
NASA’s careful decisions represent a shared victory, keeping a nearly 50-year-old spacecraft alive and contributing to science when many would have expected its mission to have ended. It is a testament to the dedication and expertise of the teams who manage these historic probes.
What to enjoy or watch next
Following Voyager 2’s success with the ‘Big Bang’ power plan, NASA now plans to implement a similar power-saving strategy on Voyager 1, which is even farther from Earth. This move is expected to extend Voyager 1’s mission life in the months ahead, maintaining humanity’s eyes and ears in interstellar space.
For those inspired by this story, it’s a wonderful time to explore Voyager’s rich legacy of discoveries — from detailed planetary flybys to its ongoing interstellar mission. Watching how NASA engineers keep these iconic spacecraft active is a thrilling reminder of the persistent human quest to explore the farthest frontiers.