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

Learn about a rare meteorite that may have separated from a protoplanet around the size of the Moon 4.5 billion years ago.

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

The ingredients that help make a planet livable did not necessarily come from where many scientists once thought. A new ...

Four-and-a-half billion years ago, a massive world—possibly as big as the moon or even Mars—orbited our sun before crashing ...

The Solar System is filled with large bodies, between planets, dwarf planets, and large moons. The count goes from dozens to ...

Meteorite fragments land across every corner of Earth. But among the roughly 80,000 meteorites discovered so far, only a ...

A study challenges the lunar origin of the asteroid Kamoʻoalewa and points to a different and surprising origin.