Now and then I miss the excitement about being in the cockpit of an airplane and doing new things.

It's a strange, eerie sensation to fly a lunar landing trajectory not difficult, but somewhat complex and unforgiving.

Man must understand his universe in order to understand his destiny.

No matter when you had been to this spot before, a thousand years ago or a hundred thousand years ago, or if you came back to it a million years from now, you would see some different things each time, but the scene would be generally the same.

Lindsay Lohan isn't a DJ, but because of her celebrity power she can do a gig somewhere, put her name on a flyer, and she'll probably bring in more people and make more money than I ever will.

Shoot for the stars but if you happen to miss shoot for the moon instead.

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.