A Sun Halo Beyond Stockholm
Above, it looks like you are looking at the Sun through a lens. However, there are actually millions of lenses! In the form of ice crystals. Small, flat, six-sided ice crystals are formed as water freezes in the upper atmosphere. When these crystals flutter to the ground much of their time is spent facing flat, parallel to the ground. When an observer passes through the same plan during sunrise or sunset and during this alignment, each crystal acts like a minature lens, refracting sunlight into our view and creating phenomena like parhelia. (Sundogs)
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