What you may not expect, however, is two moons lighting up the sky. But according to scientists, for a short period of time, we'll be getting a new "mini-moon." RELATED: 8 Amazing Things You Can See in the Night Sky Without a Telescope.

When approaching Earth, asteroids tend to do one of two things: Most of the time, they miss. Sometimes, they hit, leaving a bright streak in our planet’s sky or a gruesome new wound in its crust. But very rarely, asteroids are captured by Earth’s gravity and pirouette around the planet, becoming, in effect, a moon — albeit an ephemeral one.