MSGID: 1:153/757.0 71975936   
   TZUTC: -0700   
   CHRS: LATIN-1 2   
                           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 September 16   
         A starfield is seen above a horizon and an orange sunset. In the   
        starfield, near the horizon, is a comet with a green head and long   
          tail. Please see the explanation for more detailed information.   
      
                           New Comet SWAN25B over Mexico   
                      Image Credit & Copyright: Daniel Korona   
      
      Explanation: A newly discovered comet is already visible with   
      binoculars. The comet, C/2025 R2 (SWAN) and nicknamed SWAN25B, is   
      brightening significantly as it emerges from the Sun's direction and   
      might soon become visible on your smartphone -- if not your eyes.   
      Although the brightnesses of comets are notoriously hard to predict,   
      many comets appear brighter as they approach the Earth, with SWAN25B   
      reaching only a quarter of the Earth-Sun distance near October 19.   
      Nighttime skygazers will also be watching for a SWAN25B-spawned meteor   
      shower around October 5 when our Earth passes through the plane of the   
      comet's orbit. The unexpectedly bright comet was discovered by an   
      amateur astronomer in images of the SWAN instrument on NASA's SOHO   
      satellite. The comet is currently best observed in southern skies but   
      is slowly moving north. The featured image was captured at sunset three   
      days ago just above the western horizon in Zacatecas, Mexico.   
      
                      Tomorrow's picture: sagittarius triplet   
        __________________________________________________________________   
      
          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.   
      
   --- BBBS/Li6 v4.10 Toy-7   
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