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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.   
      
                                   2024 July 22   
        The featured image shows a dark nebula complex involving thick dust   
                         appearing brown and making a big   
      
                              Chamaeleon Dark Nebulas   
                        Image Credit & Copyright: Chang Lee   
      
      Explanation: Sometimes the dark dust of interstellar space has an   
      angular elegance. Such is the case toward the far-south constellation   
      of Chamaeleon. Normally too faint to see, dark dust is best known for   
      blocking visible light from stars and galaxies behind it. In this   
      36.6-hour exposure, however, the dust is seen mostly in light of its   
      own, with its strong red and near-infrared colors creating a brown hue.   
      Contrastingly blue, the bright star Beta Chamaeleontis is visible on   
      the upper right, with the dust that surrounds it preferentially   
      reflecting blue light from its primarily blue-white color. All of the   
      pictured stars and dust occur in our own Milky Way Galaxy with one   
      notable exception: the white spot just below Beta Chamaeleontis is the   
      galaxy IC 3104 which lies far in the distance. Interstellar dust is   
      mostly created in the cool atmospheres of giant stars and dispersed   
      into space by stellar light, stellar winds, and stellar explosions such   
      as supernovas.   
      
                       Tomorrow's picture: Chandra Crab (25)   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                                & Michigan Tech. U.   
      
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