There is no Dark Matter. The equations are wrong.
Is that for sure?
There is another model of the universe that is not based on gravity. The physicists at Los Alamos have alot information posted on the electric universe model. The main thing about the model is that it works, and doesn’t require dark matter or any other force that cannot be found or measured.
So. They’ve been looking for a black cat in a dark coal bin that turns out is not actually there.