NASA Shuts Off Instrument on Voyager 1 to Keep Spacecraft Operating

Power management and “Big Bang” reconfiguration

• Shutting down Voyager 1’s LECP instrument is expected to buy about a year of extra operations.
• Engineers are planning a larger power reconfiguration (“Big Bang”) to swap groups of devices for lower‑power alternatives to keep the spacecraft warm and science instruments running.
• Voyager 2 will be the testbed due to slightly better power margin and proximity to Earth.
• Some confusion arises over why Voyager 2’s LECP was shut off earlier despite having more power; commenters note the two craft have different active instrument mixes (e.g., Voyager 2 still has its Cosmic Ray Subsystem).

Scientific return and remaining instruments

• Voyager 1 now operates essentially two science instruments: plasma wave measurements and a magnetometer.
• Linked examples (e.g., 2021 density results) suggest it is still producing meaningful, unique data from interstellar space.
• Some argue even “expected” measurements are valuable because these are the only direct samples of that region.
• Others question whether this level of science justifies building new, similarly distant probes, though proposed future interstellar missions are referenced.

Lifetime, RTG limits, and legacy

• Discussion centers on the RTG power decline: around 2030–2036 power will likely be insufficient even for a single instrument, ending the scientific mission.
• Beyond that, Voyager will coast indefinitely through the galaxy, with speculative future stellar flybys mentioned.
• Many express strong emotional attachment and anticipate sadness when contact is finally lost; others note the craft has already far exceeded expectations.

Engineering, software, and operations

• Commenters are impressed that a 1970s probe can still be reconfigured at this depth: power rerouting, instrument shutdowns, and software changes with ~23‑hour one‑way latency.
• Comparisons are made to slow feedback cycles in early mainframe development, HPC batch jobs, and long-running test suites.
• A linked talk describes how engineers recently patched around a failed memory chip with incomplete documentation, no original designers, no simulator, and only the live spacecraft to work with, underscoring the robustness and ingenuity of the operations team.

Broader exploration debates

• Some lament the lack of additional deep-space probes beyond New Horizons and argue we should be launching more, even without rare planetary alignments.
• Others emphasize the original Voyager gravity‑assist alignment as a unique advantage, but there is disagreement over how limiting that really is.
• Side threads touch on using the Sun as a gravitational lens, the shape of the heliosphere, the Fermi paradox and continuous “hello” beacons, and the value of renewed human and robotic lunar exploration.