There are more than 170 moons in our solar system, but a few stand out.
Like Mimas, which orbits Saturn and resembles the Death Star from "Star Wars."
And Io, the most volcanic world in the solar system. Volcanoes there can shoot plumes of lava 250 miles high.
Astronomy Magazine has picked five of the weirdest moons of the cosmos to profile in its June issue, and editor Karri Ferron spoke to FoxNews.com about what makes those moons so fascinating. Take a look: