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Sun dog

A sun dog or sundog (scientific name parhelion) is a relatively common atmospheric optical phenomenon associated with the reflection/refraction of sunlight by the numerous small ice crystals that make up cirrus or cirrostratus clouds.

Note:   The above text is excerpted from the Wikipedia article "Sun dog", which has been released under the GNU Free Documentation License.
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February 9, 2016

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updated 12:56 pm ET