"The Hubble Telescope is a great mission," he said. "JWST is a great mission, but I think Voyager's in that kind of category." The Voyager mission has been gathering groundbreaking data and photos ...

Voyager 2 preceded it into space by 16 days ... When the Hubble Space Telescope imaged Neptune in 1994, the Great Dark Spot was gone, and another one had formed in the planet’s northern hemisphere.

NASA’s Voyager mission completed humankind’s first close-up exploration of the four giant outer planets of our solar system.