We can see cities during the day and at night, and we can watch rivers dump sediment into the ocean, and see hurricanes form.

I've spent my whole life not talking to people, and I don't see why I should start now.

When the space shuttle's engines cut off, and you're finally in space, in orbit, weightless... I remember unstrapping from my seat, floating over to the window, and that's when I got my first view of Earth. Just a spectacular view, and a chance to see our planet as a planet.

No man can be held throughout the day by what happens throughout the night.

I liked math - that was my favorite subject - and I was very interested in astronomy and in physical science.

I think eventually private enterprise will be able to send people into orbit, but I suspect initially it's going to have to be with NASA's help.