The 22° Halo is pretty obvious. But much more subtle is the 9° Halo.
Even more subtle is the 18° Halo.
But they may not be real. Oh, those halos are real. But they may be only artifacts in my image. Alas, I didn't have a chance to get more shots. I'll just have to keep looking up.
And I have no idea what the square grid pattern is.
To learn more about these halos visit Les Cowley's excellent Atmospheric Optics site. But you knew that, right?
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