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.

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.

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.

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.

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.

I would parade you in the hall of the monarchs of the ocean if you could breathe water.

I'm more interested in lookin' forward than back. The past is done and there's no changin' it.

We are random animals. That is who we are, and we have only ourselves, nothing more--there is no greater relationship.

We would rather be feared than respected.

Inside many of us is a small old man who wants to get out.

There cannot be good living where there is not good drinking.

Zeroth law: You must play the game First law: You can't win Second law: You can't break even Third law: You can't quit the game.

Making love to a woman is like buying real estate: location, location, location.

If we do not want to die together in war, we must learn to live together in peace.

How can someone like Alain Juppé still claim I haven't condemned the Paris and Brussels attacks, when I actually have. What I am saying is crystal clear.