Lunar impactor Theia originated near Earth and Sun analysis reveals

Berlin, Germany (SPX) Nov 21, 2025

A new study published in Science has traced the origin of Theia, the body that collided with Earth around 4.5 billion years ago and triggered the creation of the Moon. Led by the Max Planck Institute for Solar System Research and University of Chicago, the research utilizes ratios of metal isotopes to uncover Theia’s place of origin and composition.

The collision with Theia dramatically al