Cloud feature over Neptune's south pole is seen splitting in two, suggesting it could be similar to Saturn's polar vortex.
Neptune, the other blue planet, is the eighth planet in our solar system. Neptune is an ice giant.
Water is all over the solar system and the rest of the galaxy. What's it mean to the search for life?
NASA released new pictures of Neptune’s freezing moon Triton, made from data taken by the Voyager 2 spacecraft on its way out of the solar system in 1989.
Nice model of solar system evolution says migration of gas giants pushed asteroids into asteroid belt.
It has long been known that Galileo observed Neptune, but it was thought that he discounted the object as a star.
Neptune may be escorted in its orbit by thousands of asteroid-like objects, perhaps more than exist in the entire asteroid belt.