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 has confirmed it is turning off key instruments on Voyager 1 and Voyager 2, leaving just three science instruments in operation on each spacelab. The reason: to prolong the lives of the spacecraft,

Mission engineers at NASA’s Jet Propulsion Laboratory turned off Voyager 1’s cosmic ray subsystem experiment on February 25, and will shut off the low-energy charged particle instrument aboard Voyager 2 on March 24,