Wintry skies produce “rainbow smiles” or upside-down rainbows
by Milky Way Maid
SPACEWEATHER.COM has a beautiful picture of an upside-down rainbow. To quote: “The technical name for this phenomenon is circumzenithal arc or "CZA" for short–and it’s no rainbow. CZAs are formed by sunlight shining through plate-shaped ice crystals in high clouds.”
These ice rainbows are more common in fall/early winter when the sun is low — so keep an eye peeled for them. The photo was taken recently in Alabama. Consider it a smile in the sky just to brighten your day.