The logistic requirements for a large, elaborate mission to Mars are no greater that those for a minor military operation extending over a limited theatre of war.

My experiences with science led me to God. They challenge science to prove the existence of God. But must we really light a candle to see the sun?

I only hope that we shall not wait to adopt the program until after our astronomers have reported a new and unsuspected asteroid moving across their fields of vision with menacing speed. At that point it will be too late!

All one can really leave one's children is what's inside their heads. Education, in other words, and not earthly possessions, is the ultimate legacy, the only thing that cannot be taken away.

What we will have attained when Neil Armstrong steps down upon the moon is a completely new step in the evolution of man.

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.

If we were to start today on an organized and well-supported space program I believe a practical passenger rocket can be built and tested within ten years.