Want to be an astronaut? Apply now

The requirements include a bachelor's degree in engineering, science or math and three years of relevant professional experience. It's helpful to have experience in the fields of engineering or science, or expertise in flying high-performance jet aircraft.

NASA will take applications through July 1, 2008, and will announce the final selections in early 2009. Astronauts will begin training at the Johnson Space Center in Houston in the summer of 2009.