That's what Hubble can do for us. It can tell us whether the universe is expanding forever or if one day it's going to come back together.

And, so I set my goals on astronaut because, as a military aviator, it was, I considered that to be about the peak of a flying career.

So, we have to get up and get pumped up for each day.

I worked for some very good people who have helped me along the way and actually enabled me to have the opportunity to be selected to join the Astronaut Corps.

You know, piloting really isn't my hobby. And, it's probably not something I'd do in my spare time if I could do whatever I wanted to do. But, I'll tell you: if you've got to make a living, it's a great way to make a living!

Well, for me it really wasn't a case of deciding to be an astronaut.

And, all these things need to be coordinated; so we all need to work together, have timers going and everything so we're all coordinated and get this piece of orchestration done.