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Re: How Do We Even Know That They Are There?

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Posted by Herb S. on February 25, 2000 04:26:43 UTC

: How do we even know that they are there? If I am correct : these blackholes are supposed to be theory.

What have been detected are large invisible masses observed by effects on surroundings, e.g. accretion disks. Mass is too large (according to theory) to be anything else.

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