The space agency said Wednesday that a sensor on Voyager 2 that analyses charged particles and cosmic rays would be turned off later this month. Last Monday, Nasa turned off an experiment on Voyager 1

No human-made objects have traveled further into the final frontier than Voyager 1 and Voyager 2, but both probes are reaching the end of their service lives

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