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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 September 1   
      
                             The Tulip and Cygnus X-1   
                     Image Credit & Copyright: Peter Kohlmann   
      
      Explanation: Framing a bright emission region, this telescopic view   
      looks out along the plane of our Milky Way Galaxy toward the nebula   
      rich constellation Cygnus the Swan. Popularly called the Tulip Nebula,   
      the reddish glowing cloud of interstellar gas and dust is also found in   
      the 1959 catalog by astronomer Stewart Sharpless as Sh2-101. Nearly 70   
      light-years across, the complex and beautiful Tulip Nebula blossoms   
      about 8,000 light-years away. Ultraviolet radiation from young   
      energetic stars at the edge of the Cygnus OB3 association, including O   
      star HDE 227018, ionizes the atoms and powers the emission from the   
      Tulip Nebula. Also in the field of view is microquasar Cygnus X-1, one   
      of the strongest X-ray sources in planet Earth's sky. Blasted by   
      powerful jets from a lurking black hole its fainter bluish curved shock   
      front is only just visible though, beyond the cosmic Tulip's petals   
      near the right side of the frame.   
      
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