Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

The solar system also includes the Kuiper Belt and Oort Cloud, which are distant regions filled with small icy bodies and long-period comets. Related: 10 incredible volcanoes in our solar system ...

A ninth planet the size of Neptune may be hidden in the far reaches of the solar system, but the evidence has left some experts skeptical.

The James Webb Space Telescope has observed surface ice methanol — a key building block for organic compounds necessary for ...

Vesta, one of the two largest bodies in our solar system's asteroid belt, has long been thought to be more than just another ...

Astronomers have long speculated about an unseen planet lurking in the solar system's outer edge. This hypothetical world, ...

Vesta, thought to be the second-largest asteroid in the solar system, could be a piece of an ancient, unknown planet, a new ...

Discovered in 1930, Pluto was long considered our Solar System's ninth planet, but was unseated in 2006 after the discovery ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.