As far as things in space go, planets are pretty frickin’ cool. Without them, we would all be just atoms buzzing about in space, and that would probably get boring pretty quickly. Luckily, we have a pretty nice one to call home, and a lot of time on our hands to speculate about the other ones out there in the galaxy, and whether or not they have awesome people like us on them too. For some of us, it’s more fun to talk about completely made up planets because, well, those sorts of planets tend to have Klingons and Wookiees. With that in mind, here are fifteen of the coolest fictional planets in science fiction.