Why, halo there

What do you call a rainbow formed by ice? An icebow, of course. Others call the phenomenon a halo, and we'll admit it does have a mystical aura. It happens in areas where the bitter cold persists despite the shining sun, like here in Germany’s Ore Mountains. When the conditions are just right, tiny ice crystals in the air will refract light into a colourful halo around the bright sun, lighting up this pristine blanket of snow.
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