MSGID: 1:153/757.0 30a2b90e   
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   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 October 28   
      A night sky is shown with a bright red band running overhead. Above the   
      red band is a diffuse red glow. A path through a grassy filed is in the   
        foreground with a path going out toward the horizon. Please see the   
                    explanation for more detailed information.   
      
                        STEVE: A Glowing River over France   
                       Credit & Copyright: Louis LEROUX-G+ëR+ë   
      
      Explanation: Sometimes a river of hot gas flows over your head. In this   
      case the river created a Strong Thermal Emission Velocity Enhancement   
      (STEVE) that glowed bright red, white, and pink. Details of how STEVEs   
      work remain a topic of research, but recent evidence holds that their   
      glow results from a fast-moving river of hot ions flowing over a   
      hundred kilometers up in the Earth's atmosphere: the ionosphere. The   
      more expansive dull red glow might be related to the flowing STEVE, but   
      alternatively might be a Stable Auroral Red (SAR) arc, a more general   
      heat-related glow. The featured picture, taken earlier this month in   
      C++te d'Opale, France, is a wide-angle digital composite made as the   
      STEVE arc formed nearly overhead. Although the apparition lasted only a   
      few minutes, this was long enough for the quick-thinking   
      astrophotographer to get in the picture -- can you find him?   
      
                          Tomorrow's picture: webb stars   
        __________________________________________________________________   
      
          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.   
      
   --- BBBS/Li6 v4.10 Toy-7   
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