I often wonder if spirals are really like a cd with a hole in the centre.. which may be the way it is cause you would think at the centre there would be more than one or two black holes orbiting the centre...which of course would be like a window from one side of space to the other (either side of a typical spiral) would dark energy fit throuh ? I often wonder about the probability that there will be more than one black hole..if more than one there will be a hole one would think... such a system would see some nice jets..
alex
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