Astronaut selection criteria • English Conversation Questions

What are some of the basic requirements to become an astronaut?
Are there any educational requirements for becoming an astronaut?
What are some of the physical requirements for becoming an astronaut?
What kind of medical conditions could disqualify someone from becoming an astronaut?
How important is experience in the military or as a pilot for astronaut selection?
What kind of psychological traits are important for astronauts to possess?
What is the typical age range for astronauts?
What role do language skills play in astronaut selection?
Are there any opportunities for non-US citizens to become astronauts?
What is the selection process like for becoming an astronaut?
How have the selection criteria for astronauts changed over time?