please tell me that their explanation for sunset is “everything appears lower and eventually drops below the horizon the further it is”
Yep – they regular cite “perspective” (often in quite bizarre terms) along with the idea that the apparent perspective horizon always appears straight ahead, so it must come up to your eye level.
Depends who you ask: the Biblical types mumble on about a satanic Freemason plot to undermine the word of God. I mean look, Malvern Rider’s diagram clearly has a triangle with a sun at the top. A very clear reference to the Eye of Providence, a masonic symbol. etc etc
The more general conspiracy nut types tend to say something about Sheeple being kept in the dark by scientific fraud. A lie that grew and grew and must be protected by the establishment. And of course stealing public money for funding for NASA, space flight, satellites none of which really exists obviously.