Harte
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He explained that in another thread - aberrations in the lens used to take the picutre, even though the "aberration" only appears in certain areas of each pic!I think anything without an event horizon could be described as everything else we do see.
An interesting property of galaxy rotation is that a galaxy rotates about itself as if it were a solid object. And we do know that solid objects don't really need a material center to rotate about its center. So just by using those facts I could infer that anything moving rapidly close to a galactic center might be doing so around a center devoid of any matter at all. It does seem to me that the space-time in a galactic center could be looked at as if it were inside out. So backwards behavior might be something to consider.
Ah, so you don't dispute the presence of a supermassive object, just the nature of the object?
The problem with your theory of an empty centre is that it doesn't match up with the observations. For example, what about the gravitational lensing observed when a free-moving black hole moves across the sky? There's no apparent matter rotating around that object, just the black hole itself occupying a very small volume, invisible but for the effect it has on the stars around it. If the mass were more spread out, the lensing effect would be different.
Lone Black Hole Passes in Front of Star (Hubble View) | ESA/Hubble
Note the same star appearing twice due to the lensing effect from the black hole.
Harte