Astronaut意思

"Astronaut" 是一個英文單詞，指的是在太空或太空飛行器中執行任務的太空人。這個詞來源於希臘語「astro」，意為星星，和「nautes」，意為水手。因此，字面意思就是「星際水手」。

Astronauts are trained professionals who are capable of performing a variety of tasks in space, including scientific research, spacewalks, and operating spacecraft. They are often employed by national space agencies, such as NASA (National Aeronautics and Space Administration) in the United States, Roscosmos in Russia, or the European Space Agency (ESA).

The role of an astronaut can involve long-duration missions on the International Space Station (ISS), short-term missions for specific experiments or repairs, or even deep space exploration missions. Astronauts must undergo extensive training to prepare for the unique conditions of spaceflight, including exposure to microgravity, isolation, and the potential for emergency situations.