It's been our constant celestial companion for the last 4.5 billion years. But the moon is no longer the only cosmic body ...

Despite the newcomer, Earth still has just one true moon. NASA says 2025 PN7 keeps its distance - about 4 million kilometers ...

Quasi-moons are not real moons and don't actually orbit the Earth, although they sometimes appear to do so for short periods of time, Phil Nicholson, professor of astronomy at Cornell University, told ...

By contrast, quasi-moons can be our cosmic companions for tens or even hundreds of years. While scientists at the University ...