NASA Shuts Down Voyager 1 Instrument, Leaving 2 Science Tools Active

Q: If the power-saving maneuver succeeds, will NASA reactivate old instruments or just focus on extending the probe's final transmission years?

If the maneuver works, NASA is aiming for both: extend Voyager 1’s remaining years and, if power margins allow, potentially revive at least one previously shut-down instrument. The main priority is not to restore the spacecraft to its old science load, but to preserve core functions that keep the mission alive. The “Big Bang” reconfiguration is designed mainly to save about 10 watts so engineers can keep the thruster lines warm and maintain the antenna’s lock on Earth. Without that, communications would end regardless of how many instruments remain available. That said, NASA has deliberately kept open the option of restarting the Low-energy Charged Particles instrument. Engineers shut the instrument down in April to stabilize power, but they left its small 0.5-watt motor running specifically so it could be brought back if later power savings prove sufficient. That is the clearest sign the agency is not focused only on prolonging a silent spacecraft, but on maximizing science for as long as possible. In practice, any reactivation would likely be selective and temporary, not a broad return of retired systems. Voyager 1 now has only two science instruments still operating, and its power continues to fall by roughly 4 watts a year. So even if the maneuver succeeds, NASA is expected to use any extra margin cautiously: protect communications and attitude control first, then consider restoring LECP or delaying future shutdowns to keep useful science coming into the 2030s.

Q: As NASA attempts Voyager 1's 'Big Bang' maneuver, what is the single greatest risk that could silence the 49-year-old probe forever?

The greatest risk is losing attitude control — specifically, if Voyager 1’s thrusters can no longer keep its high-gain antenna pointed at Earth. That is why NASA’s “Big Bang” power-saving maneuver is so consequential. The plan is meant to free up about 10 watts so engineers can keep the thruster lines warm. If those lines get too cold and fuel or components in the propulsion system stop working properly, Voyager 1 could lose the ability to make the tiny corrections needed to hold its radio beam on Earth. If that happens, the probe would not necessarily die because its science instruments failed. It would go silent because Earth would slip out of its narrow communications beam, and at more than 15.8 billion miles away, there would be no practical way to recover it. The communication delay — approaching a full day each way by late 2026 — makes any rescue attempt even harder. The broader power decline from its aging radioisotope generators is the underlying problem, but the immediate mission-ending danger is the loss of the thrusters that preserve antenna pointing. In short, the biggest threat is not just low power by itself, but low power causing the spacecraft to lose the ability to aim and talk home.

3 articles · Updated · HYPEBEAST · Jul 15

Voyager 1’s Low-energy Charged Particles instrument was switched off on April 17, leaving the 49-year-old probe with only two operating science instruments.
NASA took the step because the spacecraft’s radioisotope power source loses about 4 watts a year, and falling power levels risk triggering an autonomous failsafe that could end the mission.
JPL is now preparing a “Big Bang” reconfiguration to save about 10 watts by swapping heaters and powered components, first testing the maneuver on Voyager 2 before using it on Voyager 1 later this year.
Keeping power available is critical to prevent thruster lines from freezing, since losing those thrusters would stop Voyager 1 from aiming its antenna at Earth.
At more than 15.8 billion miles away, Voyager 1 is expected to reach 16.1 billion miles on Nov. 18, when signals will take a full light-day each way.

Sources

HYPEBEAST1d ago

NASA's Voyager 1 Shuts Down Instrument to Manage Power, Two Science Tools Remain

AOL1d ago

After Nearly 50 Years In The Depths Of Space, Voyager 1 Still Sends Messages That Take 23 Hours To Reach Earth - AOL

Science@NASA1d ago

Voyager - NASA Science

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If the power-saving maneuver succeeds, will NASA reactivate old instruments or just focus on extending the probe's final transmission years?

As NASA attempts Voyager 1's 'Big Bang' maneuver, what is the single greatest risk that could silence the 49-year-old probe forever?

Voyager 1’s Last Decade: Navigating Power Loss, Instrument Shutdowns, and NASA’s “Big Bang” Maneuver Beyond 15 Billion Miles

Overview

On April 17, 2026, Voyager 1's Low-energy Charged Particles (LECP) experiment was shut down as part of a carefully planned strategy to extend the spacecraft's life. This decision followed a predetermined order set by the Voyager science and engineering teams years earlier, aiming to keep the mission going despite limited power. The shutdown of LECP, which also happened on Voyager 2 in March 2025, reflects NASA's focus on sustaining both spacecraft for as long as possible. By methodically powering down instruments, Voyager 1 can continue its unique scientific journey in deep space.

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