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 ...

The early solar system may have been far more chaotic than we ever imagined. A new study published in Icarus suggests that ...

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

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

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

"It points to a distinct and separate evolutionary path in planetary formation in the early history of our solar system." When you purchase through links on our site, we may earn an affiliate ...

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

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

Neptune has only been visited by one spacecraft, NASA’s Voyager 2 in 1989. Nereid was discovered 40 years earlier by Dutch astronomer Gerard Kuiper, who named the moon after the sea nymphs in Greek ...

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 ...