Every planet has their own NASA. They sometimes have secret gatherings to form a group we call IASA (Interplanetary Air and Space Association). Earth's NASA just made the whole "dwarf planet" thing up for their people, but none of the others did. Just as a side note, we have only two languages here, Earthican and Plutonian, both of which I happen to be fluent in. (You know I'm just making all this up, right?)
Of course Pluto is a planet. (Cool, btw, that we use the same language