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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.   
      
                                   2022 April 29   
      
                               Portrait of NGC 3628   
         Image Credit & Copyright: Wilhelm Michael Kasakow, Olaf Guillaume   
      
      Explanation: Sharp telescopic views of NGC 3628 show a puffy galactic   
      disk divided by dark dust lanes. Of course, this portrait of the   
      magnificent, edge-on spiral galaxy puts some astronomers in mind of its   
      popular moniker, the Hamburger Galaxy. It also reveals a small galaxy   
      nearby (below), likely a satellite of NGC 3628, and a very faint but   
      extensive tidal tail. The drawn out tail stretches for about 300,000   
      light-years, even beyond the upper left edge of the frame. NGC 3628   
      shares its neighborhood in the local universe with two other large   
      spirals M65 and M66 in a grouping otherwise known as the Leo Triplet.   
      Gravitational interactions with its cosmic neighbors are likely   
      responsible for creating the tidal tail, as well as the extended flare   
      and warp of this spiral's disk. The tantalizing island universe itself   
      is about 100,000 light-years across and 35 million light-years away in   
      the northern springtime constellation Leo.   
      
                    Tomorrow's picture: diffraction attraction   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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                                & Michigan Tech. U.   
      
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