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How do astronauts sleep whilst in space? Is there any sort of training for them to prepare for sleeping conditions? - Quora
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Space Shuttle Sleeping-bag shown on ISS (demo photo, usually not used... | Download Scientific Diagram
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Wubbo Ockels sleeping bag design for ESA,1985, image courtesy of NASA. | Download Scientific Diagram
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International Space Station astronauts forced to take cover over 'space junk' collision fears | World News | Sky News
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Life on space station means astronauts get an hour's less sleep than on Earth | London Evening Standard | Evening Standard
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