1. 1
   Know that you must be between 5 feet 4 inches and 6 feet 4 inches tall to be a pilot and between 4 feet 10 1/2 inches and 6 feet 4 inches to be a mission specialist. You also need to be in top physical condition and have great stamina.
   
2. 2
   Maintain an excellent academic record in your undergraduate and graduate studies. Many astronauts have doctoral degrees.
   
3. 3
   Choose a scientific field for your bachelor's degree that you can use if you become an astronaut. Possibilities include medicine, biology, chemistry, physics, aerospace engineering and mathematics.
   
4. 4
   Make certain you have at least 3 years of work experience in your field before applying as a mission specialist. An acceptable substitution might be a 2-year graduate degree with 1 year of experience.
   
5. 5
   Have at least 1,000 hours of pilot-in-command time in jet aircraft, preferably with flight-test experience, if you wish to be a mission pilot.
   
6. 6
   Send for an application package (see Tips for the address). You'll have to pass the strict NASA physical as a basic qualification.
   
7. 7
   Realize that if you're accepted as an astronaut candidate, you're committing yourself to a training period of 1 to 2 years in Houston without a guarantee that you'll ever go into space. Training will be intense and often in low-gravity conditions. It will include land and sea survival training and scuba diving.
   
8. 8
   Prepare to remain with NASA for at least 5 years if you pass the training period and are accepted as an astronaut.
   

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