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Well-known member
I first heard of this in, surprise surprise, Gravity's Rainbow.
en.wikipedia.org

The sun was directly behind, so I'd guess Rayleigh back scattering through a medium of suspended water, probably ice.Physics question: how is that rainbow halo produced?
niceSnowing
Don't you think we need a festival along the lines of Christmas in January and February?
There's absolutely nothing to look forward to and enjoy about these months as far as I'm aware.