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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 February 27   
      A large filamentary nebula is shown dominated by red glow but with bits   
        of blue on the lower left. The nebula is shown in a dense starfield   
           surrounded by other faint red-glowing nebulae. Please see the   
                    explanation for more detailed information.   
      
                           Supernova Remnant Simeis 147   
             Image Credit & Copyright: St+¬phane Vetter (Nuits sacr+¬es)   
      
      Explanation: It's easy to get lost following the intricate, looping,   
      and twisting filaments of supernova remnant Simeis 147. Also cataloged   
      as Sharpless 2-240, the filamentary nebula goes by the popular nickname   
      the Spaghetti Nebula. Seen toward the boundary of the constellations of   
      the Bull (Taurus) and the Charioteer (Auriga), the impressive gas   
      structure covers nearly 3 degrees on the sky, equivalent to 6 full   
      moons. That's about 150 light-years at the stellar debris cloud's   
      estimated distance of 3,000 light-years. This composite image includes   
      data taken through narrow-band filters isolating emission from hydrogen   
      (red) and oxygen (blue) glowing gas. The supernova remnant has an   
      estimated age of about 40,000 years, meaning light from this massive   
      stellar explosion first reached the Earth when woolly mammoths roamed   
      free. Besides the expanding remnant, this cosmic catastrophe left   
      behind a pulsar: a spinning neutron star that is the remnant of the   
      original star's core.   
      
                        Tomorrow's picture: how night falls   
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          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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