It may sound out of this world, but the Earth will pick up a second mini-moon this month. But don’t get too attached to this celestial body, it is only sticking around for a couple of months. It will revolve around the earth in a horseshoe-shaped orbit from September 29th until November 25th.

There's a new moon on the horizon. The Earth will gain a second, mini-moon on Sept. 29, but it won't stick around too long. Here's what to know.