A picture does a great job, but it's not nearly like being there.

Mystery creates wonder and wonder is the basis of man's desire to understand.

I'm one of the more positive cats, but when people go off about everybody wanting to be a DJ, I don't doubt them either. I understand their point as well.

NASA has been one of the most successful public investments in motivating students to do well and achieve all they can achieve. It's sad that we are turning the programme in a direction where it will reduce the amount of motivation and stimulation it provides to young people.

We have no proof, But if we extrapolate, based on the best information we have available to us, we have to come to the conclusion that ... other life probably exists out there and perhaps in many places.

The view of the moon that we've been having recently is really spectacular. It fills about three-quarters of the hatch window, and of course we can see the entire circumference even though part of it is in complete shadow and part of it is in earthshine. It's a view worth the price of the trip.

In flying, the probability of survival is inversely proportional to the angle of arrival.