The sun should appear the get smaller the farther away it travels. Some people have suggested the atmosphere magnifies it. There is 1 problem though.
1. If you go up very high, like in a plane, you'll be above most of the mass of the atmosphere. The Sun should then appear much smaller then normal, it doesn't, hypothesis failed.
Checkmate. So Flat Earther's, how do you answer this one.
Very easily, the sun fluctuates in size as well as its distance from the Earth. This is obvious, since we have seasons. This size fluctuation is also supported by stellar models which show that the radius of the Sun must change in correspondence to changes in temperature and energy output.
Discovered check....and subsequently...mate.
You are saying the size of the sun is relative to the observer. Otherwise, Chileans should see a different sized sun than Canadians on the same day, at the same time.
This is only if you assume the periodic fluctuation in size experiences a phase shift relative to the periodic fluctuation in distance. If they are commensurate, or almost so, you would not see any change...or a very small one. A small phase shift is probable, otherwise I suspect the seasonal change we experience would be rather erratic instead of periodic. This is of course, if you assume a FE point of view, which we are for this discussion.
So you need to actually show a phase shift to show you might be correct. So not check mate but rather a potential test for your hypothesis.
Yeah, this is true. This is really backwards modeling -- or "bootstrap" modeling. You know what the observations are so this helps in forming correct hypotheses. Of course, all FE theory is like this: it does not start with self-consistent theories and then see if they agree with observations, it starts with observations and uses THEM to limit the theory. Is this worse, or better? Is not reality measured (defined even) by observations more intrinsically than theory.
BTW, I'm not ignoring your request for a rotating disk model, but these things take time
