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Astronomers Pierre Kervella and Dr. Bernd Freytag used data gathered over 7 years to create this animation of what Betelgeuse might look like, due to the very low density of red super giants, fluctuations inside cause material to be flung out millions of miles before eventually falling back. : space
https://www.reddit.com/r/space/comments/zzxxem/astronomers_pierre_kervella_and_dr_bernd_freytag/
Red giants