The principle of Rayleigh Scattering explains the red or orange sunsets. Thus, we are left with the reddish portion of the light spectrum to see. For an in-depth look at this principle, check out an excellent discussion from the University of California at Riverside . The astronomical page was developed in response to assist the public with inquiries concerning astronomical data. If you have any questions or comments, please contact Mike Fuhs of the Sioux Falls NWS staff.
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