Moon Illusion

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The illusion that the full moon appears larger when seen near the horizon—because perspective is provided by buildings, trees and other landscape—and smaller when seen near its zenith
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Last book read: The Moon Illusion, a collection of scientific papers on why the moon looks bigger on the horizon.
Scientists have yet to unravel the so-called moon illusion.
Our results leave no doubt that perceived-distance information plays a primary role in creating the moon illusion," Lloyd Kaufman says.
gov/science-news/science-at-nasa/2008/16jun_moonillusion/) as NASA notes, airline pilots have witnessed the Moon Illusion at high altitudes, where there are very few buildings about.