Astronomers have found that a weird space rock at the edge of the solar system is locked in a rhythmic dance with Neptune. The object, designated 2020 VN40, is part of a family of distant solar system ...

Neptune has a complicated life story, and its moon Nereid might be the only one left standing from the planet’s ...

Neptune’s third-largest moon, Nereid, could be an intact survivor from the planet’s original satellite system, upending ...

Astronomers surveying the outer solar system have revealed that a rare object far beyond Neptune is moving in sync with the eighth planet in an unexpected way. Called 2020 VN40 and first discovered in ...

Neptune’s far-flung moon Nereid may be the last of the planet’s original companions that managed to survive a cosmic crash, ...

A new tiny ice world has been discovered beyond Pluto surrounded by a thin atmosphere, scientists revealed. The "mini-pluto" is thought to be the solar system's smallest object, but still has a ...

A study suggests that the ice giant's largest moon, Triton, made a dramatic entrance to the Neptunian system long ago, ...

Neptune’s oddball moon Nereid may be the sole remnant of an earlier system, formed near the planet rather than being pulled in from afar.

Using data from the Webb space telescope, a team of researchers is suggesting that Neptune’s moon Nereid is the only survivor ...

Scientists have discovered a bizarre planetary system where a rocky world orbits farther out than giant gas planets, defying ...

New research suggests the moons of Jupiter and Uranus may hint that our planetary neighborhood once had a third ice giant.