Dr. Brooks says that it is an unsolved mystery that doesn't make sense under the theories of the RET sun.
Will you show that he is wrong and that it does make sense?
Or, will you continue to present unsolved mystery as fact that we need to disprove?
I fail to see any connection between the photos of the sun and any mystery about the temperature of the sun's corona.
No-one here is a solar expert but there is plenty written on the topic, such as:
Why is the Sun's atmosphere hotter than its surface? Strong Evidence For Coronal Heating Theory Presented at 2015 TESS MeetingAnd "science" is quite prepared to say that many things are not yet solved.
On coronial heating, there are hypotheses which explain it, but to my limited knowledge, none that could be called "the theory" as yet but I could easily be wrong.
But in the end, this has nothing to do with the topic, which is "How do sunsets work?"
I posted a few photos as evidence that the sun's angular size does not change from solar noon to sunset, apart from some slight reduction in height.
That does not fit with any flat earth explanation of sunsets.
The sharpness of the sun's image does not seem to fit with any explanations in "Magnification of the Sun at Sunset".