In the 21st century, taking a trip into space is no longer a dream. But how do you know if you've got what it takes to become an astronaut - and could you actually survive in space? Find out about the endurance levels needed to undergo hours of practice in the nauseous Vomit Comet, survive in the freezing Arctic Ocean after splashdown and cope with being cooped up with fellow astronauts for months. This informative guide will let you know if you've got the knowledge, skills - and guts - to make it through the rigours of astronaut training.