A Sun Pillar Over Maine

Astronomy Picture of the Day · 2006-01-02 · NASA (public domain)

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A Sun Pillar Over Maine — APOD for 2006-01-02

Have you ever seen a sun pillar ? When the air is cold and the Sun is rising or setting , falling ice crystals can reflect sunlight and create an unusual column of light. Ice sometimes forms flat, six-sided shaped crystals as it falls from high-level clouds . Air resistance causes these crystals to lie nearly flat much of the time as they flutter to the ground. Sunlight reflects off crystals that are properly aligned , creating the sun-pillar effect. In the above picture taken late last month, a sun-pillar reflects light from a Sun setting over Bangor, Maine , USA .

Astronomy Picture of the Day for 2006-01-02 — image & explanation courtesy of NASA (public domain), mirrored at Tukuk-OS for reading and search convenience.

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