If Neptune were analogized with a Chevy Impala in mass, then how big is pluto compared to that? Pluto would be a matchbox car sitting on the curb.

So not enough people in this world, I think, carry a cosmic perspective with them. It could be life-changing.

When I reach to the edge of the universe, I do so knowing that along some paths of cosmic discovery, there are times when, at least for now, one must be content to love the questions themselves.

Why can't Pluto be a planet? Some people like Pluto. And if it doesn't exist then they don't have a favorite planet. Right? Please write back but not in cursive because I can't read cursive.

I lose sleep at night wondering whether we are intelligent enough to figure out the universe. I don't know.

Relativity. Gravity. Quantum. Electrodynamics. Evolution. Each of these theories is true, whether or not you believe in them.

Speaking as just simply an American who cares about the economic health of our country, I see one of the surest ways to bring wealth and prosperity to the country is to innovate in science and technology.