Order & Chaos - Iridescence/Corona at Pisa, Italy imaged by Marco Meniero . ©Marco Meniero, shown with permission.

When cloud droplets have a fairly uniform size for a few degrees around the sun or moon we see a corona. When their size varies, often in a choatic manner, we see the tumbled colours of iridescence. And often we see examples like this one between those extremes.

Atmospheric
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