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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 November 15   
      
                                Wolf's Cave Nebula   
                     Image Credit & Copyright: Gianni Lacroce   
      
      Explanation: The mysterious blue reflection nebula found in catalogs as   
      VdB 152 or Ced 201 really is very faint. It lies at the tip of the long   
      dark nebula Barnard 175 in a dusty complex that has also been called   
      Wolf's Cave. At the center of this deep telescopic view, the cosmic   
      apparitions are nearly 1,400 light-years away along the northern Milky   
      Way in the royal constellation Cepheus. Interstellar dust in the region   
      blocks light from background stars and scatters light from the embedded   
      bright star, giving the end nebula its characteristic blue color.   
      Though stars do form in molecular clouds, this star seems to have only   
      accidentally wandered into the area, as its measured velocity through   
      space is very different from the cloud's velocity. At the image bottom   
      is the planetary nebula Dengel-Hartl 5, while red glowing gas from an   
      ancient supernova remnant is also visible along the image's right side.   
      
                          Tomorrow's picture: open space   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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