I have a very high respect for professional comedians. What they do astonishes me. You have to be really smart and absorb everything, repackage it, bring it back to the person, and make them laugh at themselves. I can make people laugh during my talks because they didn't come to have me make them laugh. It's added value. So my job is way easier than that of a professional comic.

We are not figuratively, but literally stardust.

Math is the language of the universe. So the more equations you know, the more you can converse with the cosmos.

For me, one of the most fertile consequences of the space program is the extent to which it stimulates people to innovate because they want to create a different tomorrow than what they're living in today. And it's that culture of innovation that spawns entirely new economies.

I don't want to make a member of Congress do something that that member of Congress's constituents would not approve of, or would not agree to. So in that regard, I'm kind of the opposite of a lobbyist.

There are countless space activities that would be no less exciting than the moon missions were, I have no doubt. The search for life on Mars, for example.

I can tell you about the universe, but she feels it; and when you feel the universe, it has a whole other meaning to you. Otherwise, you just put a Wiki page on camera. You can learn something, but it won't mean anything to you later on.