One of the most important things about the geology on the moon is your descriptions of what you see, comparing them to things that you've seen on Earth so that the geologists and the scientists on the ground would know what you're talking about; and then take pictures of them.

People try to typecast astronauts as heroic and superhuman. We're only human beings.

To become an astronaut, someone has to have a dream of his own to do something that he or she has always wanted to do, then commit himself to making that dream come true.

Prepare for the unknown, unexpected and inconceivable . . . after 50 years of flying I'm still learning every time I fly.

We leave as we came, and, God willing, as we shall return, with peace and hope for all mankind.

I hold the world speed record downhill, in a Rover. I think it was 17 kilometers per hour, downhill.

The countdown reached ten seconds and I could almost hear an invisible crescendo of stirring background music. 'Anchors aweigh!' Five, four, three, two, one... and we had ignition!