for scene 10 of the video " Dark Matter: 'Discovered'" by Rolf Witzsche
here for a larger image
Only atomic structures emit light
The dark matter becomes 'visible' only when the movement of plasma particles affects the electron movement in the shells of atomic elements. The resulting agitation causes the atoms to emit light. Only atomic structures are able to emit light. When we see light in space, we see atoms agitated by dark matter in motion. The dark matter itself remains dark at all times.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.