Desert Sundog

Another striking desert phenomenon is the sundog. In this case, we mean the sundog of the parhelion, not canine or human, variety.  

Due most frequently to reflections in cirrus clouds, or in this case from jet exhaust, sundogs form rainbow-like spots or streaks on either side of the sun, roughly 22 degrees on either side, the National Weather Service informs us.  

For more in-depth and fascinatingly obscure information, the Wikipedia sundog information page is at your service.