Koichi Wakata is a Japanese astronaut who has participated in various missions, including long-duration stays aboard the International Space Station (ISS).
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Astronaut training: The rigorous preparation process that individuals undergo before they can become qualified astronauts.
Microgravity: A condition experienced by astronauts in space where the force of gravity is significantly reduced, resulting in a weightless environment.
Spacewalk: An activity performed by astronauts outside their spacecraft while in space, usually for repairs or experiments.