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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.   
      
                                   2023 August 2   
       The spiral galaxy is shown with many complex red filaments extending   
          out. Please see the explanation for more detailed information.   
      
                       M82: Galaxy with a Supergalactic Wind   
          NASA, ESA, Hubble; Processing & Copyright: Harshwardhan Pathak   
      
      Explanation: Why is the Cigar Galaxy billowing red smoke? M82, as this   
      starburst galaxy is also known, was stirred up by a recent pass near   
      large spiral galaxy M81. This doesn't fully explain the source of the   
      red-glowing outwardly expanding gas and dust, however. Evidence   
      indicates that this gas and dust is being driven out by the combined   
      emerging particle winds of many stars, together creating a galactic   
      superwind. The dust particles are thought to originate in M82's   
      interstellar medium and are actually similar in size to particles in   
      cigar smoke. The featured photographic mosaic highlights a specific   
      color of red light strongly emitted by ionized hydrogen gas, showing   
      detailed filaments of this gas and dust. The filaments extend for over   
      10,000 light years. The 12-million light-year distant Cigar Galaxy is   
      the brightest galaxy in the sky in infrared light and can be seen in   
      visible light with a small telescope towards the constellation of the   
      Great Bear (Ursa Major).   
      
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                      Tomorrow's picture: launch and landing   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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