*Tonight here in Southeast Missouri USA we has a HUGE, very distinct circle around the moon. I don’t believe I have ever seen one this large. They are called Lunar Halos. They are caused by the reflected light from the sun shining on the moon coming through high cirrus clouds which contain ice crystals. “As light passes through these hexagon-shaped ice crystals, it is bent at a 22 degree angle, creating a halo 22 degrees in radius (or 44 degrees in diameter” Weather lore says a lunar halo is the precursor of impending unsettled weather, especially during the winter months. This is often proved true, as cirrus and cirrostratus clouds generally precede rain and storm systems. Lunar halos are, in fact, actually fairly common. So watch the night sky – and keep the umbrella handy. (Source Farmers Almanac)

Nikon D40X with 18X55mm lens, on manual focus, time delay on a tripod