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$\begingroup$ “Galaxies contain a lot of stars, each of which are roughly as luminous as our sun”... correct, but actually a lot of the brightness comes from a few much more luminous stars. (This only reinforces the point you were making.) — “Supermassive black holes are dark”... except they tend to have an accretion disk which is anything but dark. $\endgroup$
– leftaroundabout
Commented Jun 22, 2021 at 11:39

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