Man has invented his doom
First step was touching the moon. ~ Bob Dylan

*** Ptolemy believed that the moon on the horizon was magnified by the thick moist layers of air through which it had to pass "just like the apparent enlargement of objects in water which increases with the depth of immersion". But if Ptolemy had a neat new camera he would had seen that the high moon and the horizon moon, would have photographed and measured as the same size. The distortion was therefore within the human's brain's idea of perception.

*** The Ponzo Illusion: In a drawing, two blocks of equal size are superimposed on a railroad track that converges towards the horizon, as if the lower block was at the near end of the track and the upper block farther away. The human brain always percieves the upper block to be much bigger, even after being told that the two blocks are identical in size. But as Abu Ali al-Hasan noted in the eleventh century and modern investigators have confirmed--this illusion ain't the whole story. The moon appears swollen even without perspective data-- for example when seen over a featureless seascape from a ship. Why?

*** Lloyd Kaufman, a professor of psychology, and his son James, a physicist, working in computer science, animated a stereo image of the full moon on a laptop computer. By looking at the display and crossing your eyes you could see the moon in 3-D, floating in space. A computer animation program then moved one of the images so that the moon seemed to be receding into the distance. You might expect, and the researchers had assumed, that people watching this animation would assign a smaller size to the receding moon. Instead the brain does just the opposite: As the stereographic Moon on the computer screen moves away, it appears to grow larger.

*** Most people when asked to point halfway (45 degrees) between the zenith and the horizon, point to a spot much nearer the horizon. Evidently we perceive the sky not as a dome but as a lens-shaped ceiling, the top of which is much closer than the horizon. The brain assumes that the moon, when near the zenith need not be terribly big since it's not too far away. But when the moon is near the horizon, the brain concludes that, if it's more distant than all those things, wow, it must be really big.
(This is, in effect, the idea that SciAm magazine found as a conclusive explanation.)

So, irregular constructions of the major ingredients of life are allowed and forgiven by Mother Evolution (that is, the absurd enlargement of the sun and moon) and life goes on, happily and unmindfully blissfully with them.
I think not. I think that the perceptive illusion of an exaggerated size of the sun and moon has an evolutionary function. Anybody else?