A few days back I was travelling to Karungi, Sweden to meet up with tour operator LappOne and fellow photographers Stefano Tiozzo, Gabriele Menis to join their group of aurora hunters for one night in a magical moonlight landscape. As the night grew older, thin clouds created a wonderful 22° moon halo. Not a bad scenery to wait for Northern lights!
The thin clouds high up in the atmosphere are made of countless hexagonal ice crystals which refract the light forming this halo. The same can be seen also around the sun in daytime, but should be carefully enjoyed as the sunlight is a lot stronger. More information on the 22 halo here.