"I thought the attractions of being an astronaut were actually, not so much the Moon, but flying in a..." — Neil Armstrong

If that's there, I believe that technology will probably step up to their part of it.

I believe that every human has a finite number of heartbeats. I don't intend to waste any of mine running around doing exercises.

I fully expected that, by the end of the century, we would have achieved substantially more than we actually did.

I put up my thumb and it blotted out the planet Earth.