Of course Pluto is a planet: It's massive enough to have its shape controlled by gravity rather than material strength, which is the hallmark of planethood.

It used to be said that Pluto is a misfit. But now we know Earth is the misfit. This is the most populous class of planet in our solar system and we have never sent a mission to this class.

It'll be the fastest spacecraft ever to Jupiter...13 months after launch. We pass the Moon in just nine hours.

Naming celestial objects is usually done by astronomers and professionals. Other people who are interested in space never get the opportunity to do that kind of thing.

It's strictly coincidental that Pluto of course was named for the god of the underworld and we're describing these Halloween moons

We're in the space exploration business, and the outer solar system is a wild, wooly place. We haven't explored it very well.

There are lots of really interesting little planets out there in the Kuiper Belt, but Pluto's the only one that's got all the cool attributes.

The big lesson of planetary science is when you do a first reconnaissance of a new kind of object, you should expect the unexpected.

A river is a river, independent of whether there are other rivers nearby. In science, we call things what they are based on their attributes, not what they're next to.

Competition-driven innovation and price pressure that commercial practices foster can only make human spaceflight ever more common and U.S. leadership in this domain ever clearer.

This is my war, and I don't know what side I'm on.

Prayer still works, you need not be so quick to judge another person. You never know what they are going through. Instead, pray for them. Send encouragement their way.

If love is what we search for.... Then why at the end of our search we only find pain?

I am the best. There is nobody better than me.

You only have one life and if you're not doing what you love, what's the point?

Sometimes things change, because there just isn’t any way for them to stay the same.

A snake bite emergency kit is a body bag.

The same piece of music alters at each hearing. But oh, the need to repeat and repeat and repeat unchanged the sexual experience.

I enjoy working on a number of projects - books - at once.

The presidency is probably the loneliest office in America. Regardless of your friends, regardless of how good your marriage is, regardless of anything, you are alone there at the top.