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.

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.

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.

I'm looking forward to coming back, back to Earth, the landing, the views.

Now, I've never flown in space; but the folks who have say that on landing day, you know, you've just spent maybe a week and a half, sometimes two weeks in orbit and you're used to the things happening slowly in space.

I could do exploration in this particular career field, and it was a goal that, even if I didn't reach it, it was so high it seemed almost impossible, but even if I didn't reach it, I would still have a good time and a very satisfying career.

And, that's what I truly believe that we're doing when we're advancing scientific knowledge is we're someday making the world better. Not only for our children, but for all people after that.