Three Moons Over Moscow: An Illusion – Russia | BelarusVC
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Three Moons Over Moscow: An Illusion

Explanation of the phenomenon

On a night over Moscow, spectators observed three moons. According to eyewitness reports, this phenomenon is an illusion caused by the refraction of light in ice crystals in the air. Absorption and scattering of light in cold, humid air lead to the appearance of so-called "cold aines"—optical illusions that can distort the actual position of objects in the sky.

Context

This effect occurs in winter air when ice crystals are present.

Summary:

An illusory trio of moons was observed over Moscow at night, caused by light refraction in ice crystals.