Answer in brief
Voyager 1 did not go silent for good. NASA missed its signal on 18 and 19 October 2026 and contact returned on 20 October, with the team in touch since. NASA says a thruster group went offline; the cause is still under investigation, as of 3 November 2026.
What NASA says happened between 18 and 20 October
Voyager 1 did not go silent for good. NASA's Deep Space Network failed to detect its signal during two scheduled contact attempts, on 18 and 19 October 2026, and the signal returned on 20 October, about 48 hours after contact was lost. As of 3 November 2026, NASA says the team has stayed in contact since.
The two missed attempts were 24 hours apart. According to NASA's mission blog of 29 October, the signal came back before the team sent any troubleshooting commands. The team then sent commands to the spacecraft, and the investigation continues.
A thruster group went offline and the backups switched on
NASA says one group of thrusters went offline and the backup thrusters turned on. The agency says the spacecraft's automatic fault protection most likely triggered this response. Fault protection puts the probe into a safe, stable configuration and pauses normal operations so engineers can diagnose the problem. NASA has not named a final cause. Kareem Badaruddin, Voyager mission manager at the Jet Propulsion Laboratory, said the team is relieved to be back in contact and eager to understand what happened.
Why NASA waits two days for an answer from the probe
On 18 November 2026 the probe will be 16.09 billion miles (25.89 billion km) from Earth, which NASA calls one light-day away. A radio signal then needs 24 hours to reach it, and the reply needs another 24 hours to return. When the signal was lost, it was about 16 billion miles away.
Suzanne Dodd, Voyager project manager at JPL, described the routine as sending a message and then waiting two days for a response. NASA adds that nothing aboard will change at the milestone, and that its meaning is symbolic. Press coverage calls it the first human-made object to reach that distance.
Power is falling by about 4 watts a year
NASA says each Voyager loses about 4 watts of electrical power a year as the plutonium in its generators decays. Two science instruments were switched off in recent years for that reason. In early September 2026 engineers swapped three devices on Voyager 1 for lower-power alternatives, in a procedure nicknamed the Big Bang. The devices help keep the spacecraft warm.
NASA says that without the swap, another instrument would have had to be switched off as early as summer 2027. The change lets the remaining instruments run longer than previously expected. NASA's mission page still lists Voyager as active in an extended mission.
What NASA has not said about the end of the mission
NASA has announced no end date. What the agency has said is narrower: power keeps declining, more workarounds are likely, and the team must expect the unexpected, in Badaruddin's words. Whether a future outage would be fault protection again or a different problem, nobody knows yet.
The next dated event is 18 November 2026, the one light-day mark. The cause of the thruster fault is the open question, and NASA's Voyager mission blog is where an answer would appear.
Questions and answers
Is Voyager 1 still in contact with Earth as of 3 November 2026?
Yes. NASA says the signal returned on 20 October and the team has maintained contact since. This is the position as of 3 November 2026, based on NASA's mission blog of 29 October.
Why did Voyager 1 stop responding in October 2026?
NASA has not given a final cause. It says one group of thrusters went offline and backup thrusters activated, and that automatic fault protection most likely triggered the response. The investigation is ongoing.
When will Voyager 1 be one light-day from Earth?
On 18 November 2026, at 16.09 billion miles (25.89 billion km), according to NASA. A command and its reply together then need about 48 hours, 24 hours in each direction.