Some things just can't be described. And stepping onto the moon was one of them.

I think both the space shuttle program and the International Space Station program have not really lived up to their expectations.

Once you've been first, it cannot be done again. Not by you, not by anyone else.

Space architectures capable of supporting a permanent human presence on Mars are extraordinarily complex, with many different interdependent systems.

Being first outside the spacecraft would bring much more responsibility, and I really wasn't looking for that.

I would rather people understand that there is a very, very fortunate American who was given the opportunity, and was in the right place at the right time to have the moment of a lifetime. My mother was born - her name was Marianne Moon. And she was born in 1903, the year that the Wright Brothers first flew.

I felt pretty confident in relieving myself, since I had the urge.