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

Why Nasa is switching off instruments on its twin Voyager spacecraft - The twin spacecraft, Voyager 1 and 2, launched in 1977 and are currently in interstellar space

A pair of extraordinary space missions that have been headed out of the solar system for almost half a century are getting a new lease on life as NASA engineers order the Voyager 1 and 2 deep-space probes to shut down two instruments to save power.