Moon illusion
Perceived variation in the moon's size / From Wikipedia, the free encyclopedia
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This article is about the apparent variation in the moon's size. For the discrepancy between the sun's position and the lunar terminator, see Lunar terminator.
The Moon illusion is an optical illusion which causes the Moon to appear larger near the horizon than it does higher up in the sky. It has been known since ancient times and recorded by various cultures.[1][2] The explanation of this illusion is still debated.[2][3][4]