[Melas]

Nope, that’s been debunked when purely mechanical measurements have been taken with a cmos sensor. The truth is we don’t know.

[ETL]

Nope, that’s been debunked when purely mechanical measurements have been taken with a cmos sensor.

Purely mechanical measurements confirm the Moon is the same size at the horizon as when its high in the sky. Perhaps, there is some very slight difference (assuming what you're saying is correct), but that isn't a primary factor in the creation of the illusion.

[ETL]

It’s not simply a cognitive illusion such as perspective, as monocular lenses and mechanical recording devices also “see” it.

"A simple way of demonstrating that the effect is an illusion is to hold a small object (say, 1/4 inch wide) at arm's length (25 inches) with one eye closed, positioning it next to the seemingly large Moon. When the Moon is higher in the sky, positioning the same object near the Moon reveals that there is no change in size."

Proof of Illusion:
http://en.wikipedia.org/wiki/Moon_illusion#Proof_of_illusion
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When I was last in college in the 1990’s it was a mystery we studied in astronomy, and a quick search before posting here confirms that it still hasn’t been solved.

True, it hasn't been fully solved, but illusion it is.

http://books.google.co.uk/books?id=x1qcL4CTwlIC