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Why isn’t the planet Pluto? BBC News
Pluto lost it as a planet in 2006 but reclassifying the world as a “dwarf” puts it in an exciting new category. Dr. Marek Kukula, a public astronomer at the Greenwich Royal Observatory, tells the story of a diminutive object orbiting five billion kilometers from the Sun. Subscribe http://www.youtube.com/bbcnews
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