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Episode 36: Getting to Know Xena

Play May 18•4:08

Ten billion miles away lies an object officially called 2003 UB313, but commonly known as Xena. Xena was discovered a few years ago, and since then, it's been carefully observed by a variety of telescopes. The Hubble Space Telescope recently nailed down the diameter of Xena at 1,490 miles, larger than Pluto's 1,422 miles. Xena is very reflective, almost like a mirror. From detailed...

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