Pillars are vertical shafts of light extenting a few degrees from the sun. Usually above it. They are normally seen when the sun is low on the horizon. This pillar of light is in itself uncolored but when the sun is low and has become yellow, orange or red, the pillar natually assumes the same color. It is only about 5° high seldom 15° or more. Pillars are caused by light reflected in slightly inclined orientated ice-plates

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