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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 December 5   
      
                         The Bipolar Jets of KX Andromedae   
        Image Credit & Copyright: Tim Schaeffer and the Deep Sky Collective   
      
      Explanation: Blasting outward from variable star KX Andromedae, these   
      stunning bipolar jets are 19 light-years long. Recently discovered,   
      they are revealed in unprecedented detail in this deep telescopic image   
      centered on KX And and composed from over 692 hours of combined image   
      data. In fact, KX And is spectroscopically found to be an interacting   
      binary star system consisting of a bright, hot B-type star with a   
      swollen cool giant star as its co-orbiting, close companion. The   
      stellar material from the cool giant star is likely being transferred   
      to the hot B-type star through an accretion disk, with spectacular   
      symmetric jets driven outward perpendicular to the disk itself. The   
      known distance to KX And of 2,500 light-years, angular size of the   
      jets, and estimated inclination of the accretion disk lead to the size   
      estimate for each jet of an astonishing 19 light-years.   
      
           Free APOD Lecture in Phoenix: Wednesday, December 10 at 7 pm   
                   Tomorrow's picture: remember where you parked   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
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