NASA Keeps 48-Year-Old Voyager 2 Running Another Year

NASA engineers just gave a 48-year-old spacecraft exploring the edge of our solar system a new lease on life.

Voyager 2, launched in 1977, faced a critical power shortage that threatened to shut down one of its last three working science instruments this year. But the team at NASA's Jet Propulsion Laboratory found a creative solution they're calling the "Big Bang."

The probe runs on a nuclear battery that loses about four watts of power each year as its plutonium fuel naturally decays. After nearly five decades in space, every watt counts.

Engineers reduced Voyager 2's power needs by turning off non-essential devices and switching to lower-power alternatives that still keep the spacecraft warm in the frigid depths of space. The adjustments were delicate work, considering any signal from Earth takes nearly 24 hours to reach the probe.

The spacecraft originally launched with 10 scientific instruments. It's already shut down seven of them over the years, including two just since 2024. The remaining three instruments can now operate for at least another year thanks to the power savings.

Voyager 2 sits about 13 billion miles from Earth, still faithfully transmitting data from interstellar space, a region it reached in 2018. Its twin, Voyager 1, crossed that boundary in 2012 and will get the same power-saving treatment in the coming months.

Why This Inspires

These spacecraft represent one of humanity's greatest achievements in exploration. Voyager 2 remains the only probe to visit Uranus and Neptune, capturing our first close-up images of these distant ice giants and their moons back in the 1980s.

The fact that equipment designed in the 1970s still works 13 billion miles from home speaks to both brilliant engineering and the dedication of the team keeping it alive. Every day the Voyagers operate, they send back unprecedented data about the space between stars.

The mission team's resourcefulness shows what's possible when people refuse to give up on exploration. They've extended these missions decades beyond their original plans through constant problem-solving and innovation.

The Voyagers carry golden records with sounds and images from Earth, messages in a bottle for any civilization that might find them billions of years from now. For now, they're still our eyes and ears at the edge of the solar system, pushing the boundaries of human knowledge one watt at a time.