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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 January 27   
      
                                  South of Orion   
                      Image Credit & Copyright: Vikas Chander   
      
      Explanation: South of the large star-forming region known as the Orion   
      Nebula, lies bright blue reflection nebula NGC 1999. At the edge of the   
      Orion molecular cloud complex some 1,500 light-years distant, NGC   
      1999's illumination is provided by the embedded variable star V380   
      Orionis. The nebula is marked with a dark sideways T-shape at center   
      right in this telescopic vista that spans about two full moons on the   
      sky. Its dark shape was once assumed to be an obscuring dust cloud seen   
      in silhouette. But infrared data suggest the shape is likely a hole   
      blown through the nebula itself by energetic young stars. In fact, this   
      region abounds with energetic young stars producing jets and outflows   
      with luminous shock waves. Cataloged as Herbig-Haro (HH) objects, named   
      for astronomers George Herbig and Guillermo Haro, the shocks have   
      intense reddish hues. HH1 and HH2 are just below and right of NGC 1999.   
      HH222, also known as the Waterfall nebula, looks like a red gash near   
      top right in the frame. To create the shocks stellar jets push through   
      the surrounding material at speeds of hundreds of kilometers per   
      second.   
      
                    Tomorrow's picture: the western eastern sea   
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