The thing I'll remember most about the flight is that it was fun. In fact, I'm sure it was the most fun that I'll ever have in my life.

When you can feel that close to something you're used to seeing from this great distance, well, it changes a person.

Some astronauts sleep in sort of beds - compartments that you can open up and crawl into and then close up, almost like a little bedroom.

I think eventually private enterprise will be able to send people into orbit, but I suspect initially it's going to have to be with NASA's help.

Studying whether there's life on Mars or studying how the universe began, there's something magical about pushing back the frontiers of knowledge. That's something that is almost part of being human, and I'm certain that will continue.

The experience of being in space didn't change my perspective of myself or of the planet or of life. I had no spiritual experience.

Once you are assigned to a flight, the whole crew is assigned at the same time, and then that crew trains together for a whole year to prepare for that flight.