Astronomers using Hubble Space Telescope have discovered a new, 21 mile-wide moon orbiting Pluto. They're going to call it "P4" until they can come up with a better name for it.

It's sort of crazy that Pluto has moons, since it's so tiny it was demoted from planet status. (P4 brings the number of Pluto's moons up to four.) But it's even crazier that astronomers decided to point their fancy space-based telescope toward Pluto. Pluto! Aren't there aliens they should be looking out for or something? Who's sitting around like, "I wonder what's new with Pluto?" Bored Astronomers, that's who. That's what they do instead of Twitter.