Solar System

The James Webb Space Telescope has caught a snapshot of two massive asteroids colliding in a nearby star system — and it could teach us about how common solar systems like our own are.

A new public competition will allow a lucky astronomy enthusiast to name one of Earth's tiny "quasi-moons." Here's everything you need to know about how to enter the competition for free.

A stunning photo of the recent "parade of planets" shows Mercury, Mars, Jupiter, Saturn, Uranus and Neptune in alignment over Earth. It was captured from the U.K. on June 1.

Six worlds will align for a "parade of planets" on June 3, although only a few of them will be visible to the naked eye. Here's what you need to know about the rare alignment.

Huge "tiger stripe" fault lines seen on Saturn's moon Enceladus raise hopes that a "long-lived" ocean containing potential alien life may lurk beneath the moon's icy shell.

Artificial intelligence trained by asteroid-hunting citizen scientists helped identify more than 1,000 never-before-seen solar system objects from old Hubble images spanning two decades.

The great planetary instability, which saw Jupiter and the other gas giants wander chaotically through the solar system, coincides with the collision that formed Earth's moon. Could the two events be linked?

The volcanic surface of Jupiter's huge moon Io got a stunning close-up thanks to NASA's Juno mission.

Tombaugh Regio — the large, pale heart that dominates Pluto's terrain — is made of nitrogen ice that accumulated after a huge, slow-motion impact, new research suggests.