Little by little, the night turns around... counting the leaves, which tremble at dawn... oh wait it'll only reach the surface, my bad.
Serious now. About the corona (sun "atmosphere") being hotter than the photosphere (sun "surface"), the mission itself might give clues on why, but I think that it's the wrong question:
It's less about the corona being hot and more about the photosphere being comparatively colder. My guess is that something in the photosphere composition reflects energy, either back to the nucleus or into the corona, and that a lot of the 1.3% of the Sun that are not hydrogen or helium are there.
In my opinion the better option is to ditch the concept of dogwhistle. We [people in general] should look at what a symbol (including words, gestures, etc.) conveys within a certain context, we shouldn't be picking individual symbols and assuming the discourse (what is being said) based on them.
For example, the 88 in the title of the game should be associated with the rest of the game. Because depending on the rest of the game it might convey only "1988", or it might convey "heil Hitler".