WASHINGTON — 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 ...

Astronomers finally spotted evidence of auroras on Neptune after years of searching, raising new questions about the planet.

The planet Neptune is about to take center stage in Earth's night sky. On Friday night the distant Neptune will reach a point called opposition in the constellation Aquarius.

Neptune is a mysterious blue planet near the edge of the solar system. See amazing photos of the planet Neptune, eighth planet from the sun.

This is the first time that the planet’s dark spots have ever been observed using an Earth-based telescope The findings were published on August 24 in the journal Nature Astronomy.

Neptune is the farthest planet from the sun and was the first to be predicted before it was discovered.

Neptune, the frigid world that lives past Saturn and Uranus, has been known to host large storms in its atmosphere. Recent observations of a “dark spot” storm on the planet revealed something ...

With frigid temperatures and ferocious winds, our solar system's outermost planet may be last but it's certainly not least. Get the facts on this planet of extremes. Orbiting the Sun at a distance of ...

NASA has just made a groundbreaking discovery—a new planet beyond Neptune that wasn’t there before! This mysterious find could change how we understand our solar system and the universe itself ...

The zodiac sign Pisces is ruled by two different planets in modern and traditional astrology. Here's how Neptune and Jupiter influence Pisces.