It's time to open the space frontier to citizen explorers.

In space, you don't get that much noise. Noise doesn't propagate in a vacuum.

I feel we need to remind the world about the Apollo missions and that we can still do impossible things.

The feeling of reduced gravity and the limitations of the space suit resulted in a slow-motion movement. Perhaps not too far from a trampoline, but without the springiness and instability.

Let's not spend resources that we don't need to be sending astronauts back to the moon. Let's not spend expensive resources on bringing people who have reached Mars back again. Prepare them to become a growing colony.

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.

Timing has always been a key element in my life. I have been blessed to have been in the right place at the right time.