for scene 20 of the video " Dark Matter: 'Discovered'" by Rolf Witzsche
here for a larger image
Collectively powers entire clusters of galaxies
Evidence also exists that the same process that powers galaxies, collectively powers entire clusters of galaxies. The blue ring-image that you see here, that is centered on a cluster of large galaxies, is obviously not the result of gravitational lensing, since gravitational lensing doesn't affect light in this manner. Instead, the blue image that you see reflects in the large the typical geometry that has been discovered in the laboratory in high-energy experiments.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.