A Horizon Rainbow in ParisImage Credit & Copyright: Bertrand Kulik
http://apod.nasa.gov/apod/ap130327.htmlWhy is this horizon so colorful? Because, opposite the Sun, it is raining. What is pictured above is actually just a common rainbow. It's uncommon appearance is caused by the Sun being unusually high in the sky during the rainbow's creation. Since every rainbow's center must be exactly opposite the Sun, a high Sun reflecting off of a distant rain will produce a low rainbow where only the very ...
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