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Thank you ever so much, i mean i have to do this for school and no one has any idea but you do so thanks alot for this answer.

Since no one has actually provided an answer, let me give it a "shot": Any pencil lead dust or fragment broken off in the zero gravity could be inhaled by the astronaut or get into the instruments inside the capsule before they could be filtered out. Please, someone confirm?

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14y ago

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