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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 September 10   
      The featured image a starfield that glows gold. On the left is the dark   
      horsehead nebula, while on the right is the blue-glowing Orion Nebula.   
             Please see the explanation for more detailed information.   
      
                            Horsehead and Orion Nebulas   
                 Image Credit & Copyright: Antoine & Dalia Grelin   
      
      Explanation: The dark Horsehead Nebula and the glowing Orion Nebula are   
      contrasting cosmic vistas. Adrift 1,500 light-years away in one of the   
      night sky's most recognizable constellations, they appear in opposite   
      corners of the above stunning mosaic. The familiar Horsehead nebula   
      appears as a dark cloud, a small silhouette notched against the long   
      glow of hydrogen -- here shown in gold -- at the lower left. Alnitak is   
      the easternmost star in Orion's belt and is seen as the brightest star   
      just below and to the left of the Horsehead. To the left of Alnitak is   
      the Flame Nebula, with clouds of bright emission and dramatic dark dust   
      lanes. The magnificent emission region, the Orion Nebula (aka M42),   
      lies at the upper right. Immediately to its left is a prominent   
      reflection nebula sometimes called the Running Man. Pervasive tendrils   
      of glowing hydrogen gas are easily traced throughout the region.   
      
       Astrophysicists: Browse 3,500+ codes in the Astrophysics Source Code   
                                      Library   
                        Tomorrow's picture: river meets sky   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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