Pillars from uncovered work lights above University of Alaska Fairbanks (J. Hall)

Sunset with prominent sun pillar

A light pillar is a visual phenomenon created by the reflection of light from ice crystals with near horizontal parallel planar surfaces. The light can come from the sun (usually at or low to the horizon) in which case the phenomenon is called a sun pillar or solar pillar. It can also come from the moon or from terrestrial sources such as streetlights.

See also

• Halo

External links

• Explanations and images
• An article from the Sydney Morning Herald about a recent occurrence - Fabulous frozen frames

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Sun pillar

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