Last year, I mentioned about the tenth planet, which was nicknamed ‘Sedna’ by astronomers. It was announced as a major find (BBC): a new planet, Number X, Nemesis, nee, Sedna.
Um… It’s status still appears to be in doubt. JPL-ers do mention it as a planet (as shown in this article at CSM’s), however, I fear educational institutes are still lacking. That includes NASA, apparently. And the Astrocapellas.