Launched ahead of its identical twin, Voyager 1, in 1977, NASA’s Voyager 2 spacecraft surpasses its 10,000th day in deep space. At 11 billion miles from Earth, Voyager 2 is one of the most distant human-made objects in space, surpassed only by Voyager 1. Both Voyagers are expected to function well into the 2020s, and are expected to have left the solar system to enter interstellar space by then.
