Lunar corona and aureole

 

Alto-cumulus cloud tonight is producing a clear corona around the Moon. The central bright section is called the aureole and I often see that nut tonight I could pick out the "pastel colour" rings around the outside. https://en.wikipedia.org/wiki/Corona_(optical_phenomenon) says this is a diffraction effect rather than refraction for the halos. Not quite a Circle Round the Moon but I can recommend Cearcall mun Ghealaich which is number 11 here. Geat poem and great song.