Saturday, May 5, 2012

Moon Dog

Today there is a full moon in Scorpio resulting in a moon dog or moondog (scientific name paraselene, plural paraselenae, i.e. "beside the moon"). This is a relatively rare bright circular spot on a lunar halo caused by the refraction of moonlight by hexagonal-plate-shaped ice crystals in cirrus or cirrostratus clouds.

Oil Painting copyright (c) Trevi Bennett 2012

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