It's easy to sleep floating around - it's very comfortable. But you have to be careful that you don't float into somebody or something!

Even though NASA tries to simulate launch, and we practice in simulators, it's not the same - it's not even close to the same.

I don't have any nicknames.

I love the John Glenn model... I may call NASA in 25 years or so, and see if they'd like to send me to Mars.

The most important steps that I followed were studying math and science in school. I was always interested in physics and astronomy and chemistry and I continued to study those subjects through high school and college on into graduate school. That's what prepared me for being an astronaut; it actually gave me the qualifications to be selected to be an astronaut.

If it wasn't for the women's movement, I wouldn't be where I am today.

All adventures, especially into new territory, are scary.