Blue sky with a dark cumulus cloud blooming up above some trees. On top of the cumulus cloud is a rainbow curving in a circle around the top, caused by light reflected on water droplets.

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   SETI Institute (setiinstitute@mastodon.social)'s status on Tuesday, 01-Aug-2023 03:17:03 JST SETI Institute

   #PPOD: Pictured, behind this darker cloud, is a pileus iridescent cloud, a group of water droplets that have a uniformly similar size and so together diffract different colors of sunlight by different amounts. T Also captured were unusual cloud ripples above the pileus cloud. The formation of a rare pileus cloud capping a common cumulus cloud is an indication that the lower cloud is expanding upward and might well develop into a storm. Credit: Jiaqi Sun

   #science #scicomm #weather #photography