22° halo

See also: 22-degree halo

English

22° halo around the sun
22° halo around the moon

Noun

22° halo (plural 22° halos)

  1. (meteorology) An atmospheric phenomenon caused by sunlight or moonlight refracting through millions of hexagonal ice crystals in the upper atmosphere, such as in cirrus clouds, creating a ring of light with a 22-degree radius around the sun or moon.
    Synonym: moon ring
    Coordinate terms: sun dog, parhelion, moon dog, paraselene
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