Voyager 1 Resumes Signal After Unexplained Two-Day Silence

The spacecraft unexpectedly resumed transmission on October 20 without external intervention. Engineers determined the outage stemmed from a faulty thruster set that triggered an automatic safety shutdown, forcing the probe to switch to backup systems. While the specific cause remains under investigation, the event highlights the growing volatility of the 47-year-old mission.

Kareem Badaruddin, mission manager at the Jet Propulsion Laboratory, noted that the team must prepare for unpredictable behavior as the hardware ages in the deep vacuum. On November 18, Voyager 1 will cross a significant milestone, reaching 16.09 billion miles from Earth—a distance equivalent to one light-day. At these extremes, communication is a slow process of patience; a message sent from the Deep Space Network takes nearly a full day to reach the probe, followed by another day of waiting for a response.