Like no other science, astrophysics cross-pollinate s the expertise of chemists, biologists, geologists and physicists, all to discover the past, present, and future of the cosmos-and our humble place within it.

I think if everyone had the luxury to pursue a life of exactly what they love, we would all be ranked as visionaries and brilliant.

My popularity does not derive from me pandering to people. People came to me. I don't tell anyone to follow me on Twitter. I don't tell people to like my Facebook page. I don't tell people to fill the venue. I'm offered to people, and then people come.

Only when you question does society move or advance at all.

The world, I think, has too many late-night talk shows.

The most successful scientists in the history of the world are those who posed the right questions

The solar system should be viewed as our backyard, not as some sequence of destinations that we do one at a time.