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Feb 23, 2017 at 19:43 comment added DilithiumMatrix The question has nothing to do with Hawking Radiation, neither do moving event horizons. BH are not always collapsed neutron stars (likely rarely so). There's no "if" in whether galaxies move, or that BH are at their centers. Feather and stone don't have the same gravitational field. Galaxy spiral arms are stars and gas and have nothing to do with BH, which have nothing to do (in general) with spinning NS...
Feb 23, 2017 at 19:35 history edited Mark DeGregg CC BY-SA 3.0
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Feb 23, 2017 at 19:29 history edited Mark DeGregg CC BY-SA 3.0
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Feb 23, 2017 at 19:17 history edited Mark DeGregg CC BY-SA 3.0
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Feb 23, 2017 at 19:10 history answered Mark DeGregg CC BY-SA 3.0