In the Star Wars films, the fictional planet Hoth is a world of snow and ice. Although small meteorites from a nearby asteroid field constantly pelt its surface, the planet has developed several life-forms, including the tauntaun snow lizard ridden by rebel soldiers in The Empire Strikes Back.
"A nearby asteroid field? Hmm, it would be tricky to keep it in place. said Bruce Betts, a scientist at the Planetary Society in Pasadena, California. "Perhaps it's early in that solar system's development and the planet, like early Earth, is under bombardment. But then it would be odd to have very advanced life evolved there."