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Hmmm
reading up to understand this "ever expanding star"....
I think the issue is that I'm hung up on the Airy Disk as being the manifestation of the size of the star image....and the Airy pattern of ever decreasing rings as being so low in relative intensity relative to the "core" that even if they were over-over exposed they would never reach the intensity values of the Airy disk, and would, therefore, only contribute the the "wings" of the image and not the "flat topped" over exposed, saturated area seen in and around the Airy disk..
Be gentle with me.......
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