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

If all the stars and galaxies in the universe today were smoothed out into a uniform sea of atoms, there would only be about one atom in every cubic meter of space.

Everything in space obeys the laws of physics. If you know these laws, and obey them, space will treat you kindly. And don't tell me man doesn't belong out there. Man belongs wherever he wants to go-and he'll do plenty well when he gets there.

The secret of our success on planet Earth is space. Lots of it. Our solar system is a tiny island of activity in an ocean of emptiness.

Space flights are merely an escape, a fleeing away from oneself, because it is easier to go to Mars or to the moon than it is to penetrate one's own being.

The eternal silence of these infinite spaces frightens me.

This is one small step for a man, one giant leap for mankind.

Space is really big-REALLY big.

The eagle has landed.

I suppose the one quality in astronauts more powerful than any other is curiosity. They have to get some place nobody's ever been before.