Have you ever seen these halos surround the sun before? Here's how they form!
A partial 22° degree halo observed near the Woodlawn Lake area on Sunday, March 19. Photo sent in via KSAT Connect from Taylor Mcclelland.
Ever so often, under the right sky conditions, an impressive atmospheric phenomenon occurs around the sun. Known as the 22° halo, the light ring appears to surround the sun when a deck of high clouds is present. Have you ever wondered what causes those halos to form? Well, those high clouds are made up of ice crystals that refract the light twice: once when the light enters the ice crystal, and another when the light exits the ice crystal. These refractions bend the light 22° from its original direction, creating that halo effect.
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