So far, humanity has yet to find its first "exomoon"—a moon orbiting a planet outside of the solar system. But that hasn't ...

The process, which existed for billions of years, would eventually turn lunar soil into a long-running archive of Earth's ...

Two separate research teams have observed a previously unseen microlensing event, confirming the existence of a particular ...

Tiny bits of Earth’s atmosphere have been drifting to the moon for billions of years, guided by Earth’s magnetic field.