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On this day, August 24, 2006, the International Astronomical Union (IAU) made a decision that was going to change the Solar System forever. Members of the IAU voted on a long-drawn proposal that ...

Astronomer Mike Brown didn't mean to kill Pluto -- or so he claims. Brown says the ex-ninth planet was just collateral damage in his search for the 10th. The story of that search -- and the subsequent ...