Which is the oldest spacecraft still in operation?

Voyager 1 and Voyager 2 are the oldest spacecraft still operating in space. Both launched in 1977 as part of NASA’s grand tour of the outer planets. Voyager 1 launched on 5 September 1977, slightly after Voyager 2, but it is generally identified as the oldest active probe because of its mission timeline and long-running operation. More than four decades later, both spacecraft continue to send data from beyond the planets. Their longevity makes them unmatched in the history of planetary exploration.