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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.   
      
                                 2025 November 18   
      
                     The Galactic Plane: Radio Versus Visible   
        Image Credit: Radio: S. Mantovanini & the GLEAM team; Visible: Axel   
                            Mellinger (milkywaysky.com)   
      
      Explanation: What does the Milky Way look like in radio waves? To   
      better find out, GLEAM surveyed the central band of our galaxy in high   
      resolution radio light as imaged by the Murchison Widefield Array in   
      Australia. As the featured video slowly scrolls, radio light (71 - 231   
      MHz) is seen on the left and visible light -- from the same field -- on   
      the right. Differences are so great because most objects glow   
      differently in radio and visible light, and because visible light is   
      stopped by nearby interstellar dust. These differences are particularly   
      apparent in the direction toward the center of our galaxy, seen about a   
      third of the way through. Among the many features that appear in the   
      radio, bright red patches are usually supernova remnants of exploded   
      stars, while areas colored blue are stellar nurseries filled with   
      bright young stars.   
      
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                           Tomorrow's picture: the big V   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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