Well, things are getting interesting on the planetary front. I mentioned yesterday that a decision is to be made on the status of Pluto. BBC News reports that a formal proposal has been made which would allow Pluto to keep its position as a planet. An interesting side-effect of the proposal is that a few other bodies will be promoted to planetary status, including Pluto’s moon Charon, Ceres, which is the largest body in the asteroid belt between Mars and Jupiter, and the object that started all the fuss by being bigger than Pluto – 2003 UB313, popularly known as Xena.
There’s a good article from New Scientist if you’d like to know more.
 Which is much the same size as Pluto. The centre of gravity of the two bodies is somewhere between them, which means that under this proposal they’d be labelled a “double planet” rather than a planet and a moon.
 Which actually was called a planet when it was first discovered, until some more asteroids were discovered