Neptune is big, it’s blue, and it is a planet that can tear you apart if you happen to drop into one of its massive, ...

As far as we know Neptune is the furthest full-size planet in our Solar System, orbiting the Sun some 2.69 billion miles away ...

Frigid and far-flung Neptune, our solar system's outermost planet, is adding to its reputation as an enigmatic world, with astronomers puzzled by a surprising drop in its atmospheric temperatures ...

Today in the history of astronomy, NASA announces our first view of the rings of Neptune.

Neptune Characteristics The planet Neptune orbits almost 2.8 billion miles (4.5 billion kilometers) from the Sun and is about 30 times as far from the Sun as the Earth. Like Jupiter, Saturn, and ...

A new study suggests the existence of Planet Y. This hidden planet may be affecting the Kuiper Belt. The gravity of Planet Y ...

A Neptune-like planet has never been found so close to its host star. And in fact, astronomers came up with a term, the “Neptune desert,” to describe this up-close-and-personal stellar zone.

Astronomers propose a new hypothetical planet, Planet Y, beyond Neptune, based on observed orbital anomalies in the Kuiper ...

Planet Nine is a long-theorized super-Earth at the edge of the solar system. New research suggests it's not a planet but a gigantic disk of small bodies.

Astronomers have discovered a planetary oddity: An exoplanet of an extremely rare type called a hot Neptune.