We used to joke about canned men, putting people in a can and seeing how far you can send them and bring them back. That's not the purpose of this program... Space is a laboratory, and we go into it to work and learn the new.

I think sometime we will go to Mars and I think we'll explore it with humans sometime, but I think it's really wise to do all the robotic exploration ahead of time and learn as much as possible. Once we have learned as much as possible with the robots, then that's the time to send people, and let them then continue the research that the robots have started.

Liftoff is very, very gentle, contrary to what most people think. Because you remember, the weight of the booster - the amount of thrust on the engine is just barely enough to get the booster underway. And so it's a very gentle liftoff, contrary to what most people think when they see all the fire and smoke of launch.

Exploration, of course, is going to new places, but I don't think we go to new places just solely to say: "Well, we've been there," and come back, interesting though it may be. To me, each time we go farther into space we should use that to do basic research - basic research that can't be done before you go there.

Americans just want us to... not be concerned if they can be constitutionally justified... Why, if we had to do that we could not pass most of the laws we enact around here.

That was a real fireball.

I suppose the one quality in an astronaut more powerful than any other is curiosity. They have to get some place nobody's ever been.