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DYD B-11
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To maintain the radiation exposure standards that NASA requires, the maximum time an astronaut can spend in space "is anywhere from about 300 days to about 360 days for the solar minimum activity. For solar maximum, in ranges anywhere from about 275 days to 500 days," said Eddie Semones, NASA spaceflight radiation officer. |
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2019-05-24 23:13:23 |
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