Last chance! A rare plane parade is happening on Aug. 21 and it won't happen again until 2028. Here's when and how stargazers ...

Mark your calendar so you can catch Mercury, Venus, Jupiter, Saturn, Neptune and Uranus in the sky at the same time.

When Voyager reached Neptune, it uncovered a world of raging storms, hidden patterns, and mysteries that still puzzle ...

Neptune is the fourth largest planet in the solar system, with a radius of 15,599.4 miles (24,622 kilometers) — the distance between its core and the surface.

Neptune has long been depicted as a deeper, darker blue than its fellow ice giant Uranus, but a new study shows that both are a similar shade of light greenish blue.

In terms of mass, if you add up all the satellites of Neptune, Triton composes 99.5% of the mass of everything orbiting Neptune: moons, moonlets, and rings all included.

A passing star, or a stellar flyby, with the potential to pull Neptune out of its orbit by just 0.1%, could mean catastrophe for the entire solar system. But don’t worry — it won’t happen in ...

Neptune moved into its domicile in the sweet, escapist leaning, sound bath-loving water sign of Pisces in 2011, where it will remain until 2026. Since June 25, Neptune has been stationed in ...