By the way, how much does NASA cost? It's half a penny on a dollar. Did you know that? ... The most powerful agency on the dreams of a nation is currently underfunded to do what it needs to be doing, and that's making dreams come true ... How much would you pay for the universe?

It could be that these other civilizations, if they are far more advanced intellectually than we are, would not even measure our existence as a blip on the intelligence radar. They could be so advanced that we are to them what worms are to us.

It turns out that the history of astrophysics is where we perfected time keeping.

Give a kid a book, and you change the world. In a way, even the universe.

I don't ever tell people what to do! Even if it seems and feels that way sometimes, I don't think I should tell a person how to spend their money. I try not to tell people what to read.

To believe in a universe as young as 6 or 7,000 years old is to extinguish the light from most of the galaxy.

Let us not fool ourselves into thinking we went to the Moon because we are pioneers, or discoverers, or adventurers. We went to the Moon because it was the militaristically expedient thing to do.