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Old Mar 2nd 2009, 10:21 PM   #1
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Join Date: Feb 2009
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How can black holes form?

To an outside observer, nothing can fall into the black hole since time stops on its event horizon. So how can they form in the first place? Wouldn't it take an infintely long time for the material that makes the black hole to cross the event horizon? Then can I say that black holes can't exist?
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