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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 May 13   
       A dark field surrounds a spiral galaxy with multiple arms. Please see   
                  the explanation for more detailed information.   
      
                    Gaia Reconstructs a Top View of our Galaxy   
           Illustration Credit: ESA, Gaia, DPAC, Stefan Payne-Wardenaar   
      
      Explanation: What does our Milky Way Galaxy look like from the top?   
      Because we are on the inside, humanity canCÇÖt get an actual picture.   
      Recently, however, just such a map has been made using location data   
      for over a billion stars from ESACÇÖs Gaia mission. The resulting   
      featured illustration shows that just like many other spiral galaxies,   
      our Milky Way has distinct spiral arms. Our Sun and most of the bright   
      stars we see at night are in just one arm: Orion. Gaia data bolsters   
      previous indications that our Milky Way has more than two spiral arms.   
      Our Galaxy's center sports a prominent bar. The colors of our Galaxy's   
      thin disk derive mostly from dark dust, bright blue stars, and red   
      emission nebula. Although data analysis is ongoing, Gaia was   
      deactivated in March after a succession mission.   
      
                   Jigsaw Challenge: Astronomy Puzzle of the Day   
                         Tomorrow's picture: big space egg   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
                     NASA Web Privacy, Accessibility, Notices;   
                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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