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Title: Process of Science: What evidence do scientists have that supermassive black hol Post by: ppk on Apr 20, 2012 Process of Science: What evidence do scientists have that supermassive black holes exist?
Title: Re: Process of Science: What evidence do scientists have that supermassive black hol Post by: lewis on Apr 27, 2012 Observations of orbiting stars and gas clouds in galaxies show that they are orbiting extremely massive (tens of millions of solar masses) objects that are invisible.
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