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

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

The rocket worked perfectly, except for landing on the wrong planet.

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!

It takes sixty-five thousand errors before you are qualified to make a rocket.

Nature does not know extinction; all it knows is transformation. ... Everything science has taught me-and continues to teach me-strengthens my belief in the continuity of our spiritual existence after death. Nothing disappears without a trace.

In 1492 Columbus knew less about the far Atlantic than we do about the heavens, yet he chose not to sail with a flotilla of less than three ships. . . . So it is with interplanetary exploration: it must be done on the grand scale.