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NASA wanted to assure its ability to examine the spacecraft in orbit for signs of damage.

The ability of the humans to not only function in space but be very functional when they arrive at their destination, those are the kinds of things we're learning from the science. Fuel transfer technologies and all the things we can learn about the space environment are all valuable to us for pressing on out.

I am not a brave man... I do not have the right stuff. Astronauts are really a cut above.

Having walked on the Moon, I know something about what we need to explore, really explore, in space.

I've been approached to do some things with astronauts and the preparation that astronauts go through.

Once you've been in space, you appreciate how small and fragile the Earth is.

Throughout the history of spaceflight and the study of effects of exploring to human, space environment to human body, we have accumulated enough knowledge to be able to move over to the next step: getting ready for interplanetary missions, for interplanetary exploration.

I'm just a black hole for stuff. No one should ever hand me anything, because I get so easily distracted. I'll be like, 'Oh, look, something shiny!' I'm glad I never learned how to drive. I would be really dangerous.

At the moment I'm doing this space movie, so I'm obsessed with physics and space travel. I know three months down the line it's gone. Then I'll be able to superficially say stuff about space.

Other times, you're doing some piece of work and suddenly you get feedback that tells you that you have touched something that is very alive in the cosmos.