Los Angeles - The astromers who claim to have discvoered the 10th planet in the solar system have another intriguing announcement: It has a moon.
While observing the new so called planet from Hawaii last month, a team of astronomers led by Michael Brown of the California Institute of Technology spotted a faint object trailing next to it.
The moon can help scientiest determined the mass of the new planet. In July, Brown announced the discovery of an icy, rocky object larger than Pluto in the Kulper Belt, a disc of icy bodies beyond Neptune. Brown labeled the object a planet and nicknamed it Xena after the lead character in the former TV Series "Xena: Warrior Princess". The moon was nicknamed Gabrielle, after Xena's faithful traveling sidekick.