Engineers at NASA's Jet Propulsion Laboratory have conserved energy supplies on the record-setting Voyager 1 & 2 deep space probes nearly 50 years after their missions launched to extend them further.

For nearly five decades, the twin Voyager spacecraft have pushed the boundaries of human exploration, venturing deeper into the cosmos than any other human-made object. As their power dwindles, NASA engineers are making tough choices,

However, NASA isn’t ready to say goodbye just yet, and is taking measures to get as much life out of the pair as possible. On March 5, Voyager mission engineers at the Jet Propulsion Laboratory in southern California confirmed they have already turned off Voyager 1’s cosmic ray subsystem experiment.