“The only spacecraft that has ever visited Neptune was NASA’s Voyager 2 spacecraft, which visited the planet during its Grand Tour of the Solar System. Voyager 2 made its Neptune flyby on August 25, 1989, passing within 3,000 km of the planet’s north pole. This was the closest approach to any object that Voyager 2 made since it was launched from Earth.” -Matt Williams
#NeptuneProjectCountdown
