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'm convinced that before the year 2000 is over, the first child will have been born on the moon.

It was very successful, but it fell on the wrong planet.

With our present knowledge, we can respond to the challenge of stellar space flight solely with intellectual concepts and purely hypothetical analysis. Hardware solutions are still entirely beyond our reach and far, far away.

Man belongs wherever he wants to go - and he'll do plenty well when he gets there.

The best computer is a man, and it’s the only one that can be mass-produced by unskilled labor.

One good test is worth a thousand expert opinions.