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Astronomy Picture of the Day
A Sun Pillar Over Maine
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zorg.ch
#83178
by
[z]Barbara Harris
@
03.01.2006 00:00
- nach oben -
A Sun Pillar Over Maine
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, stop-sign
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
.
Credit & Copyright