We're being prudent and taking all measures to make sure it's ready. We won't launch until it is.

It's different from the inner rocky planets. It's different from the outer gaseous planets. And as such, it holds many clues as to how the solar system was formed.

This is really a great day for NASA and the exploration of our solar system.

Pluto is a treasure trove of scientific information waiting to be discovered.

This is first-class science and we'll do everything we can to give it the go-ahead.

This is really a great day for NASA and the exploration of our solar system.