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                        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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