Scientists found proof that a giant early planet existed in the solar system 4.5 billion years ago.

Jupiter’s Ganymede — has a unique and inexplicable magnetic field. New research could finally explain it: the moon is heating ...

A rare meteorite recovered from the Sahara Desert contains evidence of a long-lost moon-size world that existed just a few ...

Looking at the Solar System, Jupiter and Uranus both have plenty of irregular moons. In supercomputer simulations, the ...

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

Ganymede may generate its magnetic field through a core that is still forming today, challenging long-held ideas about ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Flybys of Jupiter ...

Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published ...

Jupiter's giant moon Ganymede is the only known moon to have its own magnetic field — and it may be heating up in a process "not yet observed anywhere else," new research suggests. This standout ...