Demoscene coder in the mercury demogroup.\r\nPhD in Space physics. Simulates near-Earth space in big supercomputers.\r\nKnows too much about spacecraft and doesn't quite understand why.\r\nHas written a book about it.\r\nLearned to speak finnish and only went a little bit insane in the process.
If you pop out into space, you die. No oxygen to breathe, no ambient pressure makes your bodily fluids boil, UV radiation burns your skin to a crisp. It's not a good place to be for humans. So in order to survive, you need to bring a number of things along, commonly called the "life support system". This talk explains how this works!