sun pillar

sun pillar

noun Astronomy.
a halo phenomenon in which a vertical streak of light appears above and below the sun, believed to be caused by the reflection of sunlight by ice crystals with vertical axes.
Compare moon pillar.


Origin:
1900–05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Sun pillar is always a great word to know.
So is planet. Does it mean:
the polestar or North Star, a star of the second magnitude close to the north pole of the heavens, in the constellation Ursa Minor
any of the nine large heavenly bodies revolving about the sun and shining by reflected light: a similar body revolving about a star other than the sun
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