Becoming an astronaut is a challenging and competitive process that typically requires a combination of education, experience, and physical fitness. Here are some general requirements and qualifications that are usually expected of aspiring astronauts:

1. Education: Most astronauts have at least a bachelor’s degree in a STEM field, such as engineering, physics, or computer science. Some also have advanced degrees, such as a master’s or doctorate, in a related field.

2. Experience: Many astronauts have experience working in a related field, such as the military, aviation, or scientific research. Some have also completed pilot training or have experience working in high-stress or high-risk environments.

3. Physical fitness: Astronauts must be in excellent physical condition, as space travel can be demanding on the body. They must pass a rigorous physical examination and be able to pass the NASA long-duration spaceflight physical.

4. Other qualifications: Astronauts must be U.S. citizens to be eligible for the NASA astronaut corps. They must also pass a thorough background check, work well in a team, and have excellent communication skills.

5. Astronaut selection process: Becoming an astronaut is highly competitive, as NASA typically receives thousands of applications for a limited number of astronaut positions. The selection process typically includes several rounds of interviews and evaluations and medical and psychological testing.

It’s worth noting that the requirements and qualifications can vary depending on the space agency and the specific role. Additionally, private companies like SpaceX or Virgin Galactic have different needs, which tend to be less stringent than NASA’s.