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This is a really big space station. We do a lot of various kinds of work here, different kinds of science experiments; we have over 400 different experiments going on at any one time in different areas, from basic science research to medical technology, that hopefully will benefit more people on Earth.

The space station is the most unique laboratory we've ever built. The reason we have it is to do research on materials, people, medical matters, pharmaceuticals - the possibilities are nearly endless.

The International Space Station is a phenomenal laboratory, an unparalleled test bed for new invention and discovery. Yet I often thought, while silently gazing out the window at Earth, that the actual legacy of humanity's attempts to step into space will be a better understanding of our current planet and how to take care of it.

It's really a good feeling to know that we put this up there, that it's working, that all these people's plans that worked so hard came together and things fit and we've got a real space station.

To me, NASA is kind of the magical kingdom. I was sort of a geek, and you go there, and there are just these wondrously strange things and people.

Space station is, it really is one of the more, if not the most, impressive technological achievement of the modern day, not only in what we've accomplished engineering-wise but what we've accomplished on this international scale, because anybody will tell you that half the challenge is making it all work.

The Earth is a beautiful planet. The space station is a great vantage point to observe it and share our planet in pictures. It makes you more of an environmentalist.

I've always thought space station is a great name. It should be like a gas station where we go for service and supplies before heading further out.

The building of the International Space Station is something wonderful, and it will show us how to take the next step beyond low-Earth orbit.

Space excites me. My dream is to go to space.