Mystery #2Tier 1space / spacesuits
Why can't an astronaut just step outside the spacecraft in ordinary clothes?
Space begins only about a hundred kilometres straight up, shorter than many car journeys. Yet an astronaut cannot simply pop the hatch and lean out in a jumper and jeans, not even for a single second. A spacesuit is stiff, enormous and takes hours to put on. Why go to all that trouble just to step outside?

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What do you think a spacesuit has to do for the astronaut inside it?
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