Earn a strong degree in a STEM field such as engineering, physics, mathematics, computer science, or biology
Maintain excellent academic performance
Build relevant professional experience in science, engineering, medicine, aviation, or military service
Develop advanced physical fitness and overall health
Learn to work effectively in teams under pressure
Gain experience in leadership and problem-solving
Improve communication skills, especially technical writing and public speaking
Meet the basic eligibility requirements of the space agency you want to apply to
Accumulate flight experience if applying for a pilot astronaut role
Gain experience with research, operations, or mission-critical environments
Apply to a space agency astronaut selection program
Complete the agency’s medical, psychological, and background evaluations
Finish astronaut candidate training if selected
Continue building expertise, discipline, and adaptability throughout your career