And, one thing I definitely enjoyed personally, from a selfish point of view, was exploration and going to places that I had never been to before and learning, you know, meeting the people and getting to know, new sights and sounds, etc.

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.

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.

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.

Now you're coming back to Earth, and things are getting more and more dynamic.

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.