Nasa finds direct proof of dark matter

On the Chandra telescope we find images and animations of what they are talking about. Basically they are suggesting that the bulk of the normal matter of a galaxy is plasma, which is emitting x-rays (pink). But the center of mass of this cluster (blue) is moving ahead of this mass of plasma after failing to slow down from ram effects of the collision. The blue blob is called dark matter.

But what I see is a large number of visible galaxies superimposed on the blue blob, which certainly explains to me why the center of mass is located there. There is no dark matter. There must be another explanation as to why the pink x-ray emitting plasma is offset from the clusters.

There must also be another explanation for the flattening of the angular velocity curve of galactic disks. Maybe stars move more-or-less lock-step with each other, rather than freely.