"Earth Actually Has Another Moon"

"Dubbed Cruithne, this moon orbits the Earth quite differently from the familiar orb we see every night. Instead of traveling in a tight circle around the Earth, Cruithne actually follows what scientists call a“horseshoe” orbit, where the celestial body creates multiple, smaller rings that are connected and eventually compose a large circle. Essentially, it looks like a doodle.

Cruithne’s path is massive. As it swings away from the Earth, Cruithne actually comes close to Venus and Mars only to travel back near Earth again. And though it orbits the Sun once a year, it takes Cruithne about 800 years to travel all of the rings that compose its massive orbit."
http://modernnotion.com/earth-another-moon-heres-havent-heard/

Huh, interesting

(and also, you - reader - are not allowed to feel superior for knowing this)