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Every once in a while when you look at a rainbow you see extra bands of colored light along the primary bow. These are called supernumerary bows. Here is a great picture of one taken over New York posted in EarthSky. You can read more about it here. Be sure to check out the link to Atmospheric Optics for more pictures and an explanation of how they are formed, too.
Supernumerary rainbow over New York City – July 8, 2017 – by Alexander Krivenyshev of WorldTimeZone.com
