Illustration for article titled What Are Anticrepuscular Rays?

Perhaps you have seen something similar to this one day, probably when you thought you were hearing a choir of angels and the Apocalypse was about to break loose. They are anticrespuscular rays, and they happen opposite to the Sun.


Crepuscular rays—as captured here by John Britton over Colorado—happen when the sun is behind some object, usually clouds, and its rays are scattered in the air by rain, snow or dust. Perspective makes the rays go away from the Sun, giving them its supernatural God is pointing at us look.

Anticrepuscular rays are the same but, instead of looking as if they are going away from the Sun, these rays converge on the horizon 180 degrees opposite to our home star. The rays go through the sky in a straight line but they appear to re-converge at the anti-solar point because of perspective. [APOD]


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