What is a sun pillar, or light pillar?
Sun pillars, or light pillars, are shafts of light extending from the sun or other bright light source. They're caused by ice crystals drifting in Earth's air.
Continue Reading http://earthsky.orgSun pillars, or light pillars, are shafts of light extending from the sun or other bright light source. They're caused by ice crystals drifting in Earth's air.
Continue Reading http://earthsky.org
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