NASA’s twin Voyager probes, which launched in 1977, are the longest-running missions to send data home. But as their power supplies wane, scientists are saying goodbye to one instrument on each spacec

NASA engineers are turning off two instruments on Voyager 1 and Voyager 2 to ensure these twin spacecraft can continue exploring interstellar space.

The twin probes should operate for about a year before the team is forced to shut off yet more instruments. The Voyager spacecraft have been cruising through interstellar space for more than 47 years,