Stockholm Sun Pillar
Pictured by Peter RosÚn at sunrise 29th November.
©Peter RosÚn, shown with permission.
Atmospheric
Optics

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Sunlight reflected both externally and internally from the large hexagonal faces of plate crystals produce these illusions of light beaming upwards (and sometimes downwards) from the sun.

Other ice halos need well aligned crystals. Pillars need wobbly crystals, the greater the wobble the taller the pillar.