Add Yahoo as a preferred source to see more of our stories on Google. Voyager 2 launched into the solar system 49 years ago on August 20, 1977. Together with Voyager 1, the two probes are now billions ...

From Mercury's cratered surface to Neptune's deep blue atmosphere, NASA's stunning images reveal the striking beauty and diversity of all eight planets.

Flying a helicopter on another planet might sound like pure science fiction, yet space history has already proved otherwise. When NASA’s Perseverance rover thundered to Mars aboard an Atlas V rocket ...