The news of Pluto’s downgrade to “dwarf planet” or “plutino” was well-publicized, but I hadn’t realized the full extent of the decision. Several “trans-Neptune objects” have been identified – including Eris, which triggered the debate – that qualify based on the criteria (a) massive enough to be spherical due to its own gravity and (b) cleared its region of planetesimals and is not a satellite. As one astronomer put it after a more recent discovery of a “planet” beyond Pluto: “They’re Kuiper Belt Objects. Get over it.”
Based on this refined definition, there is actually a dwarf planet in the asteroid belt: Ceres. Neighborhood is getting crowded… I hear Fannie Mae has some bad loans out there.
Also: more “art” from Cassini and The Milky Way chewing up the scenery around some landmarks.