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

Scientists may have identified one of the Solar System’s most important “planet factories” hidden just beyond Jupiter.

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

A team of researchers has pinpointed a key region in the early Solar System where the building blocks of planets, called ...

Scientists believe a dust-filled ring just outside Jupiter acted like a cosmic “planetesimal factory,” producing multiple generations of early space rocks with very different compositions. The ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course. When ...

WASHINGTON (Reuters) -The James Webb Space Telescope has observed two large planets at different stages of infancy - one with an atmosphere brimming with dusty clouds and the other encircled by a disk ...