for scene 45 of the video " The Incredible Experience vs Ice Age - part 2" by Rolf Witzsche
here for a larger image
The star Rigel may be at the border line
In this context, the star Rigel may be at the border line. The plasma density around it is probably too low to enable its full potential, but after that, each of the large stars that stand as examples here, are completely inactive, all being powered to nearly the same temperature regardless of their size, either by low-level plasma fusion, or nuclear fission, or both.
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Published by Cygni Communications Ltd.
North Vancouver, BC, Canada - (C) in public domain - producer Rolf A. F.