Officials are still debating whether the recently discovered mass out beyond Pluto constitutes a tenth planet. Meanwhile, the astronomers who discovered it and nicknamed it Xena have found it has a moon, which they've named...wait for it...Gabrielle. The International Astronomical Union, a group of scientists responsible for naming planets, is deciding on formal names for the heavenly bodies, but why mess with a good thing? This could make for some keen co-marketing. Also, it should motivate the stargazers to find two more moons to complete the set.