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Take your pick... Suffocation (there's no air in space) Severe heamorraging as the cavities and blood vessels expand and rupture. (Space is a vacumn) Freezing. (It's very cold in space) Assuming you could survive all of that, the radiation from the sun would eventually kill you. Quite quickly if there happen's to be a star (like our sun) nearby that's going through a period instability; coronal mass ejections, solar flares etc..

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βˆ™ 2005-02-27 09:08:54
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Q: What happens if someone takes off his space helmet in space?
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