for scene 35 of the video " The Incredible Experience vs Ice Age - part 2" by Rolf Witzsche
here for a larger image
Two examples of class-O stars
In the two examples of class-O stars, the atomic material that make up the nebula are evidently the plasma-fusion products of the super-active super-giant stars. The atomic elements in the nebula emit light by their interaction with the plasma flowing in the sphere of the nebula, typically in the form of solar wind and interstellar plasma flowing through the nebula.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.