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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.   
      
                                   2025 June 26   
      
                                The Seagull Nebula   
                     Image Credit & Copyright: Timothy Martin   
      
      Explanation: An interstellar expanse of glowing gas and obscuring dust   
      presents a bird-like visage to astronomers from planet Earth,   
      suggesting its popular moniker, the Seagull Nebula. This broadband   
      portrait of the cosmic bird covers a 3.5-degree wide swath across the   
      plane of the Milky Way, in the direction of Sirius, alpha star of the   
      constellation of the Big Dog (Canis Major). The bright head of the   
      Seagull Nebula is cataloged as IC 2177, a compact, dusty emission and   
      reflection nebula with embedded massive star HD 53367. The larger   
      emission region, encompassing objects with other catalog designations,   
      is Likely part of an extensive shell structure swept up by successive   
      supernova explosions. The notable bluish arc below and right of center   
      is a bow shock from runaway star FN Canis Majoris. Dominated by the   
      reddish glow of atomic hydrogen, this complex of interstellar gas and   
      dust clouds with other stars of the Canis Majoris OB1 association spans   
      over 200 light-years at the Seagull Nebula's estimated 3,800 light-year   
      distance.   
      
                        Tomorrow's picture: pixels in space   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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