I was looking at the APOD labed Moondog Night. I had prior knowledge of sundogs but moondogs were something that I have never seen before. The picture shows what seems to be an explosion in the night sky when in reality it is actually just a moondog. These moondogs are created when the moonlight is refracted through hexagonal shaped crystals in cirrus clouds. The lower the moon the fainter the moondog. The moon dog in the picture only lasted ten minutes until it had faded into the night sky.
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