Why it's so special: Only one spacecraft has ever visited the eighth and most distant planet from the sun. On Aug. 25, 1989, NASA's Voyager 2 spacecraft took the first-ever close-up images of Neptune.

Chinese official calls for prioritizing Neptune orbiter mission A senior Chinese space scientist and delegate to the country’s national congress is proposing the prioritization of an unprecedented ...

The planets Uranus and Neptune are possibly the least explored planetary objects in our solar system. Due to their incredible distances from Earth, the only spacecraft to have visited these awesome ...

Voyager 2's image of Neptune released shortly after the flyby in 1989 (left) with the newly reprocessed version in true colour (right). A new study suggests that Neptune and Uranus are a similar shade ...

But Webb's observations didn't just provide new pretty pictures of the ice giant planet's greenish-blue splotches. It revealed how odd Neptune's auroras are compared to other planets', glowing over ...