I have July 14, 2015, emblazoned on my calendar. That's our arrival date at Pluto. We are now quite certain of that.

Pluto is just the brightest of the many objects in the Kuiper Belt. It's a fossil relic of the formation of our solar system.

The Kuiper Belt is the largest structure in the solar system. We used to think Pluto was a misfit.

Pluto is as far across as Manhattan to Miami, but its atmosphere is bigger than the Earth's.

Pluto has strong atmospheric cycles: it snows on the surface; the snows sublimate and go back into the atmosphere each 248 year orbit.

As a planetary scientist, I don't know what else to call Pluto: It's big and round and thousands of miles wide.