What happened to Voyager 1 instruments?

NASA shuts down Voyager 1 instrument as power fades

NASA has begun shutting down parts of Voyager 1 as the spacecraft runs out of usable power. After nearly 50 years in space and a distance of about a light-day from Earth, Voyager 1 is still operating, but its energy margin has narrowed enough that not all instruments can remain active.

The immediate change is that NASA switched off an instrument—described in the reporting as an operational step taken as the “life force” of the mission fades. The underlying issue is power generation from Voyager’s radioisotope thermoelectric generator, which produces heat and converts it to electricity. As the heat source decays over time and the electronics age, each year forces NASA to choose between keeping systems running and turning off hardware to reduce drain.

NASA’s decision fits a longer pattern for deep-space probes: maintain basic communication and navigation while disabling scientific instruments in a planned sequence. Eventually, the mission can continue only in a reduced state, potentially limited to telemetry and limited functions.

Why this matters: - Voyager 1 is one of the longest-running scientific missions ever. - Turning off instruments reduces the number of measurements available from the outer solar system. - The move signals that the spacecraft is approaching the end of its full scientific lifecycle.

What’s next remains constrained by the spacecraft’s power budget. With the instrument shutdown, NASA is extending operational life as long as possible, but the trend is unambiguous: the more systems that are switched off, the narrower Voyager’s future capabilities will become until power is too low to support additional functions.