If I'm looking fit and I'm not, then I'm cheating.

It turns out that the history of astrophysics is where we perfected time keeping.

The day we stop exploring is the day we commit ourselves to live in a stagnant world, devoid of curiosity, empty of dreams.

Space exploration is a force of nature unto itself that no other force in society can rival.

There are two ways you can receive energy from your environment: One is molecules bumping against you. That's the air. The other is radiative energy. That's what you're feeling from the sun. When they say "Get out of the sun, out of the heat," the air is the same temperature; it's just you're exposed to sunlight.

All the great advances in cinema came about from technology. The 3-D camera was not invented by a movie director. The new industries are driven by the innovations in science and technology.

They [scientists of centuries past] call on God only from the lonely and precarious edge of incomprehension. Where they feel certain about their explanations, however, God gets hardly a mention.