A rare meteorite examined in 2026 revealed evidence of a Moon-sized world that orbited the young Sun more than 4.5 billion years ago, then vanished — possibly shattered in a catastrophic collision whi

Researchers studying the Northwest Africa 12774 meteorite have found mineral evidence suggesting it originated from a Moon-sized planetary embryo that existed in the early solar system. This discovery provides new insights into the composition of vanished planetary bodies.