Space, the final frontier. There is still very little that we actually understand about the vast universe that we live in. (Check out our list on 25 Puzzling Mysteries From Outer Space That Will Leave You Baffled if you’re curious to see some of what scientists are still trying to figure out.) However, what we do know is that space is very clearly trying its best to kill us all. From deadly radiation to exploding super-stars, the galaxy is dangerous enough to make even the bravest (or craziest) astronauts think twice before deciding to exit our nice, protective atmosphere. Still, the human race is determined to go out and explore the cosmos, so just to make sure we know exactly what we’re getting into, here are 25 Space Facts That Will Both Terrify And Amaze You.