The Plastic Brain

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Today’s 22° ice halo.

22° angle, and it was about 22°C, too.


22° halos form when the sky contains millions of variously oriented (poorly correlated) ice crystals. Some of these happen to be aligned perpendicular to the sun’s light as viewed by any given observer, which produces the illuminated 22° circle, while other crystals produce the same phenomenon for other observers.”

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