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Object To Come 25,000 Miles Close

An asteroid named Pitbull will barely miss Earth on Sunday. NPR's Lynn Neary talks to Paul Cox of the citizen astronomer group Slooh about why it's so difficult to keep track of these space rocks. http://www.npr.org/2014/09/07/346534024/near-earth-object-to-come-25-000-miles-close #FullNewsAudioAvailable #NPR

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