Wx Factoid: 9/28/2012
There are three types of dusk: civil, nautical and astronomical. They correspond to the sun being 6, 12 and 18 degrees below the horizon, respectively.Friday, September 28th 2012, 4:20 pm
By:
Richard Clark
There are three types of dusk: civil, nautical and astronomical. They correspond to the sun being 6, 12 and 18 degrees below the horizon, respectively.
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