I want to keep on the move, keep stimulated and challenged.

At the core of the risk-free society is a self-indulgent failure of nerve.

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

There's a historical milestone in the fact that our Apollo 11 landing on the moon took place a mere 66 years after the Wright Brothers' first flight.

People communicate in Twittering ways. I've learned how to do that.

Computers allow us to squeeze the most out of everything, whether it's Google looking up things, so I guess that tends to make us a little lazy about reading books and doing things the hard way to understand how those things work.

Trips to Mars, the Moon, even orbit, will require that we provide astrotourists with as many comforts from home as possible, including paying each other.