What is the halo-like ring you sometimes see around the moon?
That breathtaking vision in the night sky is the result of ice crystals refracting the light of the moon. The halo rings the moon when high, thin cirrus clouds made up of millions of these crystals cover the sky. The moon’s light enters into the hexagonal-shaped ice structures and is bent before passing out another side of the crystals, causing a ring of light to appear around the moon. But this phenomenon is not limited to the moon — given the right conditions, you can spot a sun halo as well. Halos typically appear as a ring of white light around the moon or the sun, but they can also appear in color
