The object dubbed Earth's "second moon" is actually a quasi-satellite that's accompanied the planet since 1957 — not a true ...

Researchers believe the “quasi-satellite” has accompanied Earth since 1957.

Every year the moon’s orbit gets a little bigger and it moves just a little farther away. Should we worry about the Moon ...

Earth’s atmosphere is slowly leaking into space, and new research shows some of it reaches the Moon, where it may be ...