OPOD What's New Rays & Shadows Water Droplets Rainbows Ice Halos Contents Crystals Frequent Halos 22° circular Sundogs Tangent Arcs Circumscribed Pillars Circumzenithal Circumhorizon Formation How rare? Gallery Parhelic Circle Infrequent Halos Multiple Displays Other Worlds Observing Halos HaloSim High Atmosphere Links & Resources Search - Index 123456789012345678  | 
     
      
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