Credit & Copyright: Peggy Peterson
Explanation:
What's happening over the horizon?
Although the scene may appear somehow
supernatural,
nothing more unusual is occurring than a
setting Sun and some well placed clouds.
Pictured above are
anticrepuscular rays.
To understand them, start by picturing common
crepuscular rays that are seen any time that sunlight pours though scattered
clouds.
Now although sunlight indeed travels along
straight lines, the projections of these lines onto the
spherical sky are
great circles.
Therefore, the
crepuscular rays from a
setting (or rising) sun
will appear to re-converge on the other side of the sky.
At the anti-solar point 180 degrees around from the
Sun, they are referred to as
anticrepuscular rays.
While enjoying the sunset after dinner near
Horseshoe Canyon in Utah, the photographer chanced to find that an even
more spectacular sight was occurring in the other direction
just over the canyon -- a particularly vivid set of
anticrepuscular rays.
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Publikacii s klyuchevymi slovami:
anticrepuscular rays - antisumerechnye luchi - zahod Solnca
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