Abstract
NASA has built human habitations for a trip to the moon and for low earth orbit. These habitations include Skylab, Shuttle and the International Space Station. We also have experience with the Russian station, Mir. Shuttle and the Lunar experiences are considered somewhat short term in nature, under 20 days, and do not really test nor answer the physical performance issues of long term human physical activity in space. We have some experience in long term human physical activity from Skylab, MIR and Space Station, but much more is needed to understand physical demands of working in space. Even more is needed for the long term lunar and planetary experience. We need more information about habitats, space suits and exploring in these environments.
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