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Voyager 1 gives controllers the silent treatment

Space1 min read

Voyager 1, NASA's far-away spacecraft, went silent for a few days in October 2026 before its signal came back. Engineers are now trying to understand why it happened.

The silent spacecraft

On October 18, 2026, NASA's Deep Space Network (DSN) could not pick up a signal from Voyager 1. On the next try, on October 19, there was still nothing. On October 20, the signal came back. Engineers think some thrusters (small rockets that steer a spacecraft) turned off and backup thrusters switched on. The onboard computers may have noticed a problem and put the probe into a safe mode.

Key facts

  • The silent period lasted a few days, from October 18 to October 20, 2026.
  • Voyager 1 and Voyager 2 will both reach their 50th year next year.
  • Voyager 2 had an antenna pointing problem in 2023.
  • In September, the team finished a power-saving step called the "Big Bang" on Voyager 1, about six weeks after Voyager 2.
  • In a few weeks, commands will take a full 24 hours to reach Voyager 1, and its replies will take another 24 hours to reach Earth.

Why the probes are fragile

The twin Voyager probes were launched decades ago and are now very far from Earth. Their power is falling, so the team has turned off many devices and moved to lower-power backups. In 2023 and earlier, power problems led Voyager 1 to shut off one of its two radio transmitters by itself. The team has to work carefully with old hardware.

Why it matters

The mission will end one day, and the team has planned for that. Right now, the spacecraft are still working. The short silence is a warning that the probes can surprise their controllers. Engineers want to know the cause before it happens again.

What to watch

  • Whether NASA finds the exact cause of the October silence.
  • Whether Voyager 1 stays in normal operation after the safe mode.
  • Whether both Voyager probes reach their 50th anniversary next year.
  • How long the probes can keep sending data, based on technology and funding.

Glossary

Deep Space Network (DSN)
NASA's network of large radio dish antennas that talk to spacecraft far away in space.
Voyager 1
A NASA spacecraft launched decades ago that is now farther from Earth than any other human-made object.
thrusters
Small rocket engines that push or turn a spacecraft.
safe mode
A low-activity state where a spacecraft shuts down most tasks to protect itself while engineers check for problems.
Big Bang
The team's nickname for a procedure that turned off onboard devices and switched to lower-power alternatives to save power.

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