Admit it: Like just about everyone else, you aspired to outer-space travel when you were nine years old. Some of us never shake that out-of-this-world daydream to become an astronaut; we still secretly harbor that yearning to zap through meteor showers and past Saturn, seeking to go, yes, where no person has gone before. Well, get a grip, Captain Kirk: Those dreams leave out a lot of the actual astronaut training process, such as learning to eat or bathe upside down in the NASA zero gravity simulator (otherwise known as the "Vomit Comet") or to walk in space wearing an unwieldy monster suit, with only a tether to keep you from floating... More >>>