Question

how to become a astronaut? ​

Answer 1

First of all you have to study.

and after that The agency's basic requirements are a bachelor's degree in engineering, biological science, physical science, computer science or mathematics, followed by three years of professional experience (or 1,000 hours of pilot-in-command time in jet aircraft). Candidates also must pass NASA's astronaut physical examination.

then

these are the qualification you have to do

A bachelor's degree in engineering, biological science, physical science, computer science or mathematics. At least three years of related professional experience obtained after degree completion OR at least 1,000 hours pilot-in-command time on jet aircraft.

hope it helps