Neptune, a frigid planet decorated with supersonic storms, has been visited by only one spacecraft, Voyager 2, which zipped by in 1989.Consequently, little is definitively known about the planet ...

Neptune's elliptical, oval-shaped orbit keeps the planet an average distance from the sun of almost 2.8 billion miles (4.5 billion kilometers), or roughly 30 times as far away as Earth, making it ...

New images from the space-based observatory offer a novel view of the planet in infrared. By Jonathan O’Callaghan No spacecraft has visited Neptune since 1989, when the NASA probe Voyager 2 flew ...