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Credit & Copyright: Thorleif RÜdland
Explanation:
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-sun-pillar
effect.
In the featured picture taken last week,
a sun-pillar reflects light from a
Sun setting over
Fensfjorden,
Norway.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: Sun Pillar
Publications with words: Sun Pillar
See also: