Delightful to hear that the astronomers got thrown into disarray by the discovery of a planetoid further out than Pluto, but larger.
After some dispute, 'they' - the International Astronomical Union (IAU) - have decided to downgrade Pluto from planet status, rather than add this new object in. It has had some nicknames for a while, but they have settled on Eris - Goddess of Discord (and named its moon after Disnomia, apparently Eris's lawless daughter).
All Hail Discordia!
For those of you recently arrived, the Discordians (who worship Eris) appear prominently in Illuminatus! - the magnum opus of RAW the founder. And if you want true enlightenment on the subject I can only recommend The Book - Principia Discordia.
You can find the various editions, etc at the link below if you wish to compare versions of:
THE PRINCIPIA DISCORDIA
or, How I Found the Goddess and What I Did To Her When I Found Her
THE MAGNUM OPIATE OF MALACLYPSE THE YOUNGER
Wherein Is Explained Absolutely Everything Worth Knowing About Absolutely Anything
For those of you into astrology, Antero Alli has pointed out an Eris ephemeris, here.