My definition about astronaut

My opinion about astronaut is a person trained by a human space flight program to command, pilot , or serve as a crew member of a spacecraft.

While generally reserved for professional space travelers, the term is sometimes applied to anyone who travels into space including scientists, politicians, journalists, and tourists.

Until 2003, astronauts were sponsored a trained exclusively by governments, eather by the military, or by civilian space agencies. And if I want to be astronaut, I must go to space scool and learn about how to life in space.

Become astronaut is very interesting.