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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.   
      
                                   2023 April 14   
      
                               Portrait of NGC 3628   
         Image Credit: Image Credit & Copyright: Mike Selby & Mark Hanson   
      
      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 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: Z is for Mars   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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