Contrary to what you may think based on the title of this post, I am not talking about a TV show starring Lucy Lawless. Nope, I am talking about the planet 2003UB313. This planet, unofficially known as Xena, is the tenth planet of the solar system. It was first photographed in October of 2003, confirmed as a planet in January of 2005, and announced to the world in July of 2005. Xena is about 2700 kilometers in diameter, slightly bigger than Pluto, and orbits at from 38 to 97 AU from the sun: 38 to 97 times as far from the sun as the earth.
And now, it has been discovered that Xena has a moon. The 250 km wide body which orbits Xena has been named Gabrielle.
More information on Xena (and Gabrielle) can be found here and here.
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