As the 30-year Space Shuttle era draws to a close next month, NASA will have to rely on the Russians for a ride during the next few years. That's why NASA's 2009 ASCANs were subject to more restrictive anthropomorphic requirements than their Shuttle-faring predecessors. Finalists had to be between 62-75 inches tall in order to fit properly in the Soyuz TMA spacecraft. Taller or shorter applicants were disqualified. However, once other vehicles like NASA's Multi-Person Crew Vehicle (MPCV), SpaceX's Dragon, and Virgin Galactic's SpaceShipTwo are proven safe for human transport, we could see a great widening of selection requirements so that almost anyone with the right stuff will be able to fly into space.
That's why we may see the emergence of "After the Shuttle: Astronauts for Hire", which just happens to be the title of a cover story Discover Magazine article featuring an interview with me and former astronaut Ken Bowersox. The 2-page article focuses on how what it means to be an astronaut is changing in the post-Shuttle era. Get your copy of the June issue on newsstands now!