MSGID: 1:317/3 63f263cf   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    EPOD - a service of USRA   
      
   The Earth Science Picture of the Day (EPOD) highlights the diverse processes   
   and phenomena which shape our planet and our lives. EPOD will collect and   
   archive photos, imagery, graphics, and artwork with short explanatory   
   captions and links exemplifying features within the Earth system. The   
   community is invited to contribute digital imagery, short captions and   
   relevant links.   
      
      
    Brocken Spectre and Glory Observed from Viterbo Airport, Italy   
      
      February 17, 2023   
      
       Gloria-e-Spettro   
      
       Fogbow-Gloria-Spettro   
      
      Photographer:  Marco Meniero   
      
      Summary Author:  Marco Meniero   
      
      Suppose we're standing on a hill and the Sun is shining behind us, our   
      shadow is projected onto the fog below and is apparently transformed   
      into a pyramid-shaped silhouette with its apex at the  antisolar   
      point, right where the shadow of our head appears. This shadow is   
      called the  Brocken Spectre (top photo) and was coined years ago   
      during observations held on the Hartz Mountains in Germany. If the apex   
      of the shadow is surrounded by a luminous halo then this is referred to   
      as a  Glory (bottom photo), which can often be seen from the window   
      seat on a commercial jet. The Glory, like the Brocken Specter is an   
      antisolar phenomenon, and both result from the  diffraction of   
      sunlight.   
      
      According to atmospheric physicist Robert Greenler, the halos drawn on   
      the heads of the saints in art history seem to be an   
      interpretation/reproduction of the Glory. Based on a theory formulated   
      by Van De Hulst H. C, the rings of the Glory are formed by  water   
      droplets or minute ice crystals found in stratus-type clouds. The   
      radius of the concentric rings can vary from a minimum of 1.2° to a   
      maximum of 8.3°. Photos taken on December 28, 2022.   
      
      Photo details: Nikon Z9 camera; ISO 32; optic Nikon S14-12/2.8 lens;   
      f/4.5).   
      
      
      Viterbo Airport, Italy Coordinates: 42.436111, 12.061667   
      
      
   Related EPODs   
      
       Brocken Spectre and Glory Observed from Viterbo Airport, Italy   
       Anti-twilight Colors and Belt of Venus  Splendid Sundog over   
      Montreal, Canada  The Fisherman and the Full Omega Moon  Inferior   
      Mirage off the Coast of Sicily  Crepuscular Rays Observed from   
      Italian Alps   
       More...   
      
   Atmospheric Effects Links   
      
        *  Atmospheric Optics   
        *  Optic Picture of Day: Gruppo Astrofili Galileo Galilei   
        *  Color and Light in Nature   
        *  The Colors of Twillight and Sunset   
        *  Refraction Index   
        *  Image Gallery: Atmospheric Effects   
        *  What is a Rainbow?   
      
   -   
      Earth Science Picture of the Day is a service of the  Universities   
      Space Research Association.   
      
   https://epod.usra.edu   
       
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