Upon the discovery of several new planets within our own solar system, astronomers are rethinking their criteria for planets. Among the new planets for consideration are such extraterrestrial bodies as Xena, Sedna, and Quarog (I hope I spelled that right).
Xena's discovery has prompted the International Astronomical Union to reconsider its definition of a planet. Currently it considers both Pluto and Xena to be trans-Neptunian objects, and says that until it has drawn up its new definition, that is what they will remain.
BTW, I love the name "Xena" and her moon, "Gabrielle".
"Astronomers at the WM Keck Observatory have identified a moon orbiting Xena, a body they argue is the 10th planet in our solar system. They have called the moon Gabrielle, after Xena's sidekick in the TV series 'Xena: Warrior Princess'."
An excellent choice for naming a planet, IMHO. Hope it stays.