Transcript for scene 20 of the video " Dark Matter: 'Discovered'" by Rolf Witzsche  

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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. Witzsche