Exploration of Neptune
In Voyager 2's last visit with a planet before leaving the solar system, Voyager 2 came 3000 miles (5000 km) above Neptune's north pole, the closest approach it made to any planet after it left Earth. Voyager 2 studied Neptune's atmosphere, its rings, its magnetosphere, and its moons. Several discoveries were made, including the discovery of the Great Dark Spot and Triton's geysers.