We thought that Voyager 1 had already given everything it could. NASA continues to turn off parts to keep it alive

to some 25,000 million kilometers from Earth, Voyager 1 continues to send us data from interstellar space, Farther than any other ship built by humanity. The probe was launched in 1977 and, almost half a century later, it remains operational with an increasingly delicate condition: to keep it alive, the mission team is shutting down parts of the ship itself. That is exactly what has just happened with one of its scientific instruments, in a maneuver that reveals the delicate moment the mission is going through.

The maneuver. On April 17, engineers at the Jet Propulsion Laboratory in Southern California they sent the order to turn off the experiment Low-energy Charged Particlesbetter known as LECP. It is an instrument dedicated to measuring low-energy charged particles, including ions, electrons and cosmic rays from both our solar system and the galaxy. The decision was not improvised. According to NASA, this instrument was next in the order agreed upon years ago by the scientific and engineering teams to cut consumption without terminating the mission.

There are no solar panels. To understand why NASA has reached this point, we have to look at how Voyager 1 is powered. The probe does not work with solar panels, but with a radioisotope thermoelectric generator that converts the heat generated by the decay of plutonium into electricity. This system has allowed the mission to be sustained for decades, but its capacity is not infinite. According to NASA, both Voyager 1 and Voyager 2 They lose about 4 watts of power per yeara small loss on paper, but decisive when you have been managing each watt with extreme care for almost half a century.

The scare that accelerated the decision. Although the shutdown of the LECP was part of a previously defined roadmap, there was a recent episode that forced the team to move more carefully. During a routine turn maneuver on February 27, Voyager 1’s power levels dropped unexpectedly. The US agency explains that any additional descent could activate the ship’s undervoltage protection system, designed to disconnect components on its own and protect it.

A calculated “pruning”. The shutdown sequence was decided a long time ago, in joint conversations between those who design the scientific part of the mission and those who technically keep it alive. Of the 10 instruments each Voyager had, seven have already been turned off. In addition, the LECP will not be completely disconnected: the small motor that allows the sensor to rotate to scan in all directions will remain on, because it barely consumes 0.5 watts and keeps a remote option open to reactivate it later.

The plan that comes now. With this shutdown, NASA does not consider the issue closed, but rather gains time to attempt a deeper intervention. According to the agency, switching off the LECP should give Voyager 1 about a year of respite. During that time, engineers want to complete a more ambitious energy adjustment for the two probes, dubbed “big Bang“The idea is to change several energy-consuming devices at once, turning off some and replacing others with lower consumption alternatives, to conserve the necessary heat and continue operating scientific instruments for as long as possible.

When will the maneuver be attempted?. NASA will first test this setting on Voyager 2, which is closer to Earth and has slightly more power. The tests are planned for May and June 2026 and, if they go well, the team will try to apply the same maneuver on Voyager 1 no earlier than July.

Images | POT

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