For my confirmation, I didn't get a watch and my first pair of long pants, like most Lutheran boys. I got a telescope. My mother thought it would make the best gift.

I have learned to use the word 'impossible' with the greatest caution.

It will free man from his remaining chains, the chains of gravity which still tie him to this planet. It will open to him the gates of heaven.

Our sun is one of 100 billion stars in our galaxy. Our galaxy is one of billions of galaxies populating the universe. It would be the height of presumption to think that we are ...

Research is what I'm doing when I don't know what I'm doing.

We can lick gravity, but sometimes the paperwork is overwhelming.