"Pluto is interesting because it’s fixed on its moon, Charon, and they rotate around each other, constantly staring at each other affectionately, which is kind of a beautiful metaphor but I think that’s one of the reasons why it was demoted. Because I think now to be a proper planet you have to command the authority of others and because the moon and Pluto are sort of existentially attached as equals neither of them can be considered a planet. [Pauses] Sad, but true."