It’s B612. No! It’s 2003 UB313

A long-held suspicion has finally taken shape as a formal announcement by three astronomers. There is a tenth planet and it has a moon. It will most likely be called “Xena”. I wonder if popular culture has an influence in that name. In any case, since I still belong to that generation in which certain things were learned by heart in school, it will take a while to learn to say, “Our Solar System has nine, I mean, ten planets…”