MSGID: 1:153/757.0 a3e738cd   
   TZUTC: -0700   
   CHRS: LATIN-1 2   
                           Astronomy Picture of the Day   
      
       Discover the cosmos! Each day a different image or photograph of our   
         fascinating universe is featured, along with a brief explanation   
                       written by a professional astronomer.   
      
                                   2024 August 6   
        A large storm cloud is pictured hovering over a flat landscape with   
       telephone poles. The background sky is blue. The cloud appears orange   
       at the bottom, yellow at the top, white in the middle, with dark gray   
        overtones all around. Please see the explanation for more detailed   
                                   information.   
      
                              Storm Cloud Over Texas   
            Image Credit & Copyright: Laura Rowe (Used with permission)   
      
      Explanation: What makes this storm cloud so colorful? First, the cloud   
      itself is composed of millions of tiny droplets of water and ice. Its   
      bottom is almost completely flat -- but this isn't unusual. Bottom   
      flatness in clouds is generally caused by air temperature dropping as   
      you go up, and that above a specific height, water-saturated air   
      condenses out water droplets. The shape of the cloud middle is caused   
      by a water-droplet-laden column of air being blown upward. Most   
      unusual, though, are the orange and yellow colors. Both colors are   
      caused by the cloud's water drops reflecting sunlight. The orange color   
      in the cloud's middle and bottom sections are reflections of a nearly   
      red sunset. In contrast, the yellow color of the cloud's top results   
      from reflection of light from a not-yet-setting Sun, where some -- but   
      less -- blue light is being scattered away. Appearing to float above   
      the plains in Texas, the featured impressive image of a dynamic   
      cumulonimbus cloud was captured in 2021 while investigating a tornado.   
      
                         Tomorrow's picture: galaxy three   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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