That is a new concept that I absolutely love. The atmosphere falls naturally into stacks for reasons unexplained, but it does. It squeezes more dense or less dense mass (incorrect use of terms) up or down, which is why objects fall to the earth. It also bends light around the horizon so ships disappear from the bottom up as they go over about 5km, all due to atmospheric density. It matters not that when atmospheric density changes, more or less of the ship/distant object doesn't just appear. Now it seems to have been decided that objects are magnified or demagnified as the light from them travels (light doesn't actually travel apparently) through the atmosphere. It just magnifies.
The real fantastic thing is that as the sun or moon rises up the dome and should look smaller, the atmosphere adjusts their image so they always appear the same size, no matter what the atmospheric conditions or the position of the observer. Wow.
Science: See result, make up random shit for a cause. It reminds me of reading that it has been well known for a very long time that swallows disappear in the winter. Why? Where do they go? These days we have the answer (I've never actually rode on the back of a swallow to Africa so I'm appealing to authority here, sheep schooling), so it was assumed they went to the moon or slept in river beds. No explanation as to why it was the case for either, no evidence, it was just said.