Pluto has always been a problem because it's less massive than the moon...[and] it's only about one 500th as massive as the Earth. So is it just a rock or is it a real planet?

We have tried to give the highest priority to the research that we need to get to the moon and Mars and beyond. Is the science scaled back? You bet it is. But is it no science at all? No, we're still trying to utilize this station all we can up there.

That's how I hope to die: on my deathbed, watching 'Real Housewives of the Moon.'

I think the new discoveries are going to indicate that Pluto should not really be called a planet.

It's not at all exotic. Every time you look at the water in a nuclear reactor, the bluish glow you see is radiation produced by charged particles moving faster than the speed of light in the water.

We should know whether it's working in a few months.