If one day you are walking and you realize that your shadow has a halo, do not panic, it has an explanation. One of my photos selected and explained today in OPOD Optics Picture Of the Day. https://www.atoptics.co.uk/fza199.htm Very grateful to Les Cowley for his fantastic work in illustrating and explaining all these atmospheric phenomena.
Stunning clouds before sunrise. Please, zoom in on the image to see how many details these clouds offer. Click here to get in High Resolution 7111x4000px (All rights reserved) (Save Link As…) Noctilucent Cloud in Estonia by Isaac GP