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The Moon Illusion
A Simple Demonstration

This is only a representation of the actual Moon illusion, and is not the actual illusion itself. However it is a fairly accurate thumbnail of how the Moon might appear in the night sky.

In this demonstration the Moon will follow your mouse from low on the horizon to a point high in the sky. The Moon will grow to about one and a half times its normal size when it is near the horizon. This is how the Moon Illusion might look to an observer on the ground.

About 85% percent of the population can see this illusion in nature.


Java Applet: ©2000 Tony Azevedo
Art: R. Ausbourne

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