A space program that truly goes somewhere! With his deeds, not only words, President Obama has revitalized our struggling space program.

By venturing into space, we improve life for everyone here on Earth - scientific advances and innovations that come from this kind of research create products we use in our daily lives.

Mars has a bit of air pressure; maybe we can build up that atmosphere to be a bit more accommodating to humans.

The energy varies with the square of the velocity, so if you need five times the velocity, that's 25 times the energy.

Astronauts are not superhuman. They lead ordinary lives and have varied personalities.

The pilgrims on the Mayflower landed at Plymouth Rock. To my knowledge, they didn't wait around for a return trip to Europe. You settle some place with a purpose. If you don't want to do that, stay home. You avoid an awful lot of risks by not venturing outward.

Space is not just going up and coming back down again. Space is getting into orbit and being there, living there, establishing a presence, a permanence.