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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 3   
       The featured image shows steam rising from several separated vents at   
       Hverir, a geothermally active field in Iceland. Green aurora rage in   
           the background. Please see the explanation for more detailed   
                                   information.   
      
                            M33: The Triangulum Galaxy   
               Image Credit & Copyright: Processing - Robert Gendler   
      Data - Hubble Legacy Archive, KPNO, NOIRLab, NSF, Aura, Amateur Sources   
      
      Explanation: The small, northern constellation Triangulum harbors this   
      magnificent face-on spiral galaxy, M33. Its popular names include the   
      Pinwheel Galaxy or just the Triangulum Galaxy. M33 is over 50,000   
      light-years in diameter, third largest in the Local Group of galaxies   
      after the Andromeda Galaxy (M31), and our own Milky Way. About 3   
      million light-years from the Milky Way, M33 is itself thought to be a   
      satellite of the Andromeda Galaxy and astronomers in these two galaxies   
      would likely have spectacular views of each other's grand spiral star   
      systems. As for the view from the Milky Way, this sharp image combines   
      data from telescopes on and around planet Earth to show off M33's blue   
      star clusters and pinkish star forming regions along the galaxy's   
      loosely wound spiral arms. In fact, the cavernous NGC 604 is the   
      brightest star forming region, seen here at about the 1 o'clock   
      position from the galaxy center. Like M31, M33's population of   
      well-measured variable stars have helped make this nearby spiral a   
      cosmic yardstick for establishing the distance scale of the Universe.   
      
                        Tomorrow's picture: pixels in space   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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