He actually flew on the shuttle Discovery before the ship was grounded.
As President and CEO of the company Ad Astra Rocket Company, he is designing a manned rocket with the theoretical capability to get to planet Mars in 39 days.
Just click on the video above for the full interview. Chang-Diaz shares his astronaut stories as well as his current project--another space-related dream.
For more coverage of the shuttle’s landing in Virginia today, and retirement in Washington D.C., click here: NASA SHUTTLE DISCOVERY.