Engineers at NASA’s Jet Propulsion Laboratory have shut down one of the scientific instruments on the Voyager 1 spacecraft in order to conserve energy and extend its operation in interstellar space. The instrument, Low-Energy Charged Particles experiment (LECP), measures low-energy charged particles, including ions, electrons, and cosmic rays from our solar system and the galaxy.
After operating almost continuously since its launch in 1977, the spacecraft is now facing a steadily declining energy supply from its nuclear power source. As NASA explains, Voyager 1, like Voyager 2, relies on a radioisotope thermoelectric generator, which gradually produces less power over time.
To preserve essential systems and extend the mission, engineers are progressively shutting down instruments and other power-consuming components. NASA says this decision is part of a long-planned energy management strategy designed to ensure the spacecraft continues sending data from a region of space no other mission has explored.
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Estimates suggest that turning off the LECP will give Voyager 1 about one more year of operation. During this time, engineers are working on additional energy-saving solutions. The plan involves shutting down and optimizing multiple systems simultaneously, allowing the spacecraft to remain warm enough to continue collecting data.
Since Voyager 2 is closer to Earth and has slightly more available power, the plan will first be tested on it in May and June this year. If successful, the same approach will be applied to Voyager 1. If all goes well, there is even a possibility that the LECP instrument could be turned back on in the future.
Voyager 1 is currently more than 15 billion miles (about 25 billion kilometers) from Earth, meaning that commands sent to the spacecraft take around 23 hours to arrive, while the shutdown process itself takes more than three hours.
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