The image I have in mind about why physicists are miscalculating the amount of gravity in galaxies is that of a hurricane. While a hurricane is a monster of energy, the properties of the
center of a hurricane are not linked to that energy outburst; the center of a hurricane is an 'empty' spot.
While I do not claim that the center of a galaxy is empty, I claim that the center of a galaxy is that of a normal state (albeit under special circumstances). While in the eye of the hurricane, there isn't much of a storm going on - people can see blue sky and there is not much wind. The conditions are 'normal.'
I am not a physicists but when I read how physicists calculate the center of gravity in galaxies I think they mistake the model of our solar system (in which the gravity center is in the middle) and expect it to fit as a model for the galaxies. They use the size and the spin of the galaxy to calculate the gravitational force of that center. I think that is a mistake. I think gravity in galaxies is more like group gravity rather than center gravity; so the cohesion is caused by the gravity of the group, not by an incredibly powerful gravity of the center. Again, I am not a specialist in this kind of information so I can not really argue my case with scientific data, but in my minimal researches on what the physicists are using to back up their claims I must say that I was disappointed.
So, while I think there is something about the center of galaxies - it is a special spot in which the circumstances are quite peculiar - I do not think it contains any extraordinary amounts of gravity. Could it be a hellish place? That could very well be the case. In a hurricane some things may be dropping into the middle of the storm; a truck or so that was picked up by the hurricane could fall out of the sky in the middle. I would imagine that mass/energy could get 'dropped' inside the center of galaxies where all of a sudden there is a 'normal' state. Would it appear to fall off the radar screen? Good chance. I have always been intrigued by the two plumes coming out/moving away perpendicularly from the center of galaxies. Images:
http://www.aoqz76.dsl.pipex.com/Web%...ack%20Hole.jpg and
http://www.nrao.edu/pr/2002/3c120.vl...cher.still.jpg Because, do these plumes contain all the energy that 'falls' into the ordinary gravitational state of the center? Calculations so far have been shown to suggest that it is not enough, but those calculations start out with the assumption that the center is a spot of highly centered gravity, not of ordinary gravity.
I do not know if my idea of gravity is correct, but if each galaxy does not contain an enormous center of gravity then the total amount of energy in our universe would be alot less. Dark matter may still exist (who knows) but the calculations would be quite different.