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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 October 30   
       A starfield is shown with a big light bubble in the center. A bright   
      star is toward the upper right in the translucent bubble. To some, the   
         bubble may resemble a skull. Please see the explanation for more   
                               detailed information.   
      
                            NGC 7635: The Bubble Nebula   
                          Credit & Copyright: Chad Leader   
      
      Explanation: What created this huge space bubble? Blown by the wind   
      from a star, this tantalizing, head-like apparition is cataloged as NGC   
      7635, but known simply as the Bubble Nebula. The featured striking view   
      utilizes a long exposure to reveal the intricate details of this cosmic   
      bubble and its environment. Although it looks delicate, the 10   
      light-year diameter bubble offers evidence of violent processes at   
      work. Seen here above and right of the Bubble's center, a bright hot   
      star is embedded in the nebula's reflecting dust. A fierce stellar wind   
      and intense radiation from the star, which likely has a mass 10 to 20   
      times that of the Sun, has blasted out the structure of glowing gas   
      against denser material in a surrounding molecular cloud. The   
      intriguing Bubble Nebula lies a mere 11,000 light-years away toward the   
      boastful constellation Cassiopeia.   
      
        Your Sky Surprise: What picture did APOD feature on your birthday?   
                                    (post 1995)   
                       Tomorrow's picture: All Hallow's Eve   
        __________________________________________________________________   
      
          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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