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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 1   
        The featured image the Lobster Nebula, star field with a few bright   
      blue stars surrounded by a red-glowing nebula that could be visualized   
      as a lobster. Please see the explanation for more detailed information.   
      
                           NGC 6357: The Lobster Nebula   
       Image Credit: CTIO/NOIRLab/DOE/NSF/AURA; Processing: T. A. Rector (U.   
      Alaska Anchorage/NSF's NOIRLab), J. Miller (Gemini Obs./NSF's NOIRLab),   
                     M. Zamani & D. de Martin (NSF's NOIRLab)   
      
      Explanation: Why is the Lobster Nebula forming some of the most massive   
      stars known? No one is yet sure. Cataloged as NGC 6357, the Lobster   
      Nebula houses the open star cluster Pismis 24 near its center -- a home   
      to unusually bright and massive stars. The overall red glow near the   
      inner star forming region results from the emission of ionized hydrogen   
      gas. The surrounding nebula, featured here, holds a complex tapestry of   
      gas, dark dust, stars still forming, and newly born stars. The   
      intricate patterns are caused by complex interactions between   
      interstellar winds, radiation pressures, magnetic fields, and gravity.   
      The image was taken with DOE's Dark Energy Camera on the 4-meter Blanco   
      Telescope at the Cerro Tololo Inter-American Observatory in Chile. NGC   
      6357 spans about 400 light years and lies about 8,000 light years away   
      toward the constellation of the Scorpion.   
      
                           Tomorrow's picture: sun block   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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