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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 January 23   
       A very deep image of the night sky shows many stars and nebulas. Many   
      bright nebulas appear to be connected by faint orange filaments. Please   
                see the explanation for more detailed information.   
      
                     Deep Nebulas: From Seagull to California   
                     Image Credit & Copyright: Alistair Symon   
      
      Explanation: How well do you know the night sky? OK, but how well can   
      you identify famous sky objects in a very deep image? Either way, here   
      is a test: see if you can find some well-known night-sky icons in a   
      deep image filled with faint nebulosity. This image contains the   
      Pleiades star cluster, Barnard's Loop, Horsehead Nebula, Orion Nebula,   
      Rosette Nebula, Cone Nebula, Rigel, Jellyfish Nebula, Monkey Head   
      Nebula, Flaming Star Nebula, Tadpole Nebula, Aldebaran, Simeis 147,   
      Seagull Nebula and the California Nebula. To find their real locations,   
      here is an annotated image version. The reason this task might be   
      difficult is similar to the reason it is initially hard to identify   
      familiar constellations in a very dark sky: the tapestry of our night   
      sky has an extremely deep hidden complexity. The featured composite   
      reveals some of this complexity in a mosaic of 28 images taken over 800   
      hours from dark skies over Arizona, USA.   
      
                         Tomorrow's picture: you are here   
        __________________________________________________________________   
      
          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.   
      
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