Earth Has a Quasi-Moon Called Cruithne

Earth has a quasi-moon called 3753 Cruithne, a roughly 2-km-wide asteroid that follows a strange horseshoe-shaped orbit around our planet. It doesn’t orbit Earth directly like the Moon, but it moves in a way that makes it seem like a companion. It’s been around for thousands of years and will stick with us for at least another few millennia before drifting away.