It was interesting to think that the very first liquid ever poured on the Moon, and the first food eaten there, were communion elements.

Upon stepping foot on the moon, Buzz remarked to Houston, 'Beautiful, beautiful. Magnificent desolation.'

My first biography written in '73 was not 'Journey To The Moon.' It was 'Return To Earth.' Because for me, that was the more difficult task - disappointment.

The best way to study Mars is with two hands, eyes and ears of a geologist, first at a moon orbiting Mars... and then on the surface.

Somebody would think I was trying to get favored treatment because my ancestors had the name Moon. And that's a joke.

To send humans back to the moon would not be advancing. It would be more than 50 years after the first moon landing when we got there, and we'd probably be welcomed by the Chinese. But we should return to the moon without astronauts and build, with robots, an international lunar base, so that we know how to build a base on Mars robotically.