NASA astronaut

A NASA astronaut is a trained scientist or engineer selected to travel into space, often to operate spacecraft, conduct scientific experiments, or maintain space stations like the International Space Station. They undergo rigorous training in areas such as spacecraft systems, emergency procedures, and physical fitness to prepare for the unique challenges of living and working in space. Astronauts represent humanity's efforts to explore, research, and understand outer space, contributing to technological advancements and scientific knowledge that benefit life on Earth.