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Extravehicular activity (EVA) is defined as any activity performed by an astronaut or cosmonaut, outside of the vehicle/habitat, beyond Earth’s atmosphere. This includes both microgravity activities (e.g., outside a vehicle or station while in orbit) and partial gravity activities (e.g., Lunar or Martian surface exploration).
Detailed Description
Extravehicular activity (EVA), or spacewalking, is an integral aspect of human space exploration – it is the phase of the mission where astronauts have the opportunity to directly interact with a space or planetary environment, enabling unique opportunities for science, engineering, and exploration. The first EVA was conducted by cosmonaut Alexey Leonov on March 18, 1965; since Leonov’s historic venture outside his spacecraft on the Voskhod 2 mission, hundreds of EVAs have been conducted for a variety of purposes, including deploying and repairing deep-space telescopes (e.g., the Hubble Space Telescope [HST]),...
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Holschuh, B., Newman, D. (2019). EVA. In: Young, L., Sutton, J. (eds) Encyclopedia of Bioastronautics. Springer, Cham. https://doi.org/10.1007/978-3-319-10152-1_18-1
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DOI: https://doi.org/10.1007/978-3-319-10152-1_18-1
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