Voyager 1 restores contact as NASA stretches its dwindling power supply
NASA says the distant probe resumed communicating after an unexplained interruption, while engineers have completed a power-saving change designed to preserve its remaining instruments.
Photo credit and license
Photo: NASA/JPL-Caltech / NASA (archival/context image; Archival NASA/JPL-Caltech photograph of one of the Voyager probes from 1977; not a photograph of the October 2026 communication event.) · Image source · License: Public domain in the United States — NASA-created image (PD-NASA)NASA reported on October 29 that Voyager 1 had recovered from a brief communications interruption earlier in the month. The spacecraft’s signal was missing during two scheduled attempts by the Deep Space Network on October 18 and 19, then reappeared on October 20. The team has remained in contact since, but the precise cause is still being investigated. Engineers found that one group of thrusters went offline and backup thrusters activated, a response the spacecraft is designed to make when it detects a potential fault.
The incident came just weeks after engineers completed a separate effort to conserve electrical power. In early September, they replaced three power-hungry devices with lower-power alternatives, making changes together to preserve the distribution of heat inside the aging probe. NASA says that without this adjustment it might have had to shut down another scientific instrument as early as summer 2027. Voyager relies on radioisotope generators, and its available electrical output decreases by roughly four watts a year.
Launched in 1977, Voyager 1 has long since passed the planets it was built to explore and now measures conditions in interstellar space. NASA expects it to reach a distance of one light-day from Earth on November 18, 2026. That is a communications milestone rather than a physical boundary: radio signals will take about 24 hours to travel each way. The latest events illustrate both the durability of the mission and the growing difficulty of maintaining a scientific spacecraft nearly half a century after launch.
