“Pluto is still active four and a half billion years into its history. It was expected that small planets like Pluto would cool off long ago and not still be showing geological activity. Pluto is, i...”

“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.”

“I like the planets because they are real places that you can go to and send machines to. Faraway astronomy - galactic astronomy and extra-galactic astronomy - is really cool stuff, but to me, it's ...”

“It says something very deep about humans and our society, something very good about us, that we've invested our time and treasure in building a machine that can fly across three billion miles of sp...”

“I'm hopeful that commercial space exploration will takeoff. To really fuel the spaceflight revolution will require an investment of hundreds of billions of dollars a year, and I think that's only g...”

“I tend to think of Pluto and its moons as presents sitting under a Christmas tree. They're wrapped, and from Earth all we can do is look at the boxes to see whether they're light or heavy, to see i...”

“I like form and shape and strength in pictures.”

“Faith is not a thing which one 'loses', we merely cease to shape our lives by it.”

“I personally think humans have got about as far as we can go. We're wrecking the planet. We're never short of good reasons to massacre each other. Wrong god. Wrong race. Wrong color. Wrong sex. I'm...”

“The rocket worked perfectly except for landing on the wrong planet.”

“Gravity is a contributing factor in nearly 73 percent of all accidents involving falling objects. ”

“Marriage has affected the laws of gravity. We will now revolve around each other. You will exert gravity on me, and I will exert gravity on you. We are one another's moons. You are holding onto my ...”

“Magic is the fifth fundamental force and is even more mysterious than gravity, which is really saying something.”