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   TZUTC: -0800   
   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.   
      
                                  2023 January 31   
         Comet ZTF is shown high above and far beyond a row of silhouetted   
           trees. The top inset image shows how the comet looked through   
        binoculars, while the lower inset image shows how the comet looked,   
        last week, thought a small telescope. The lower inset image clearly   
      shows the comets coma, dust tail, ion tail, and a noticeable antitail.   
             Please see the explanation for more detailed information.   
      
                            A Triple View of Comet ZTF   
             Image Credit & Copyright: Javier Caldera & Miguel Gracia   
      
      Explanation: Comet ZTF has a distinctive shape. The now bright comet   
      visiting the inner Solar System has been showing not only a common dust   
      tail, ion tail, and green gas coma, but also an uncommonly distinctive   
      antitail. The antitail does not actually lead the comet -- it is just   
      that the head of the comet is seen superposed on part of the fanned-out   
      and trailing dust tail. The giant dirty snowball that is Comet C/2022   
      E3 (ZTF) has now passed its closest to the Sun and tomorrow will pass   
      its closest to the Earth. The main panel of the featured triple image   
      shows how Comet ZTF looked last week to the unaided eye under a dark   
      and clear sky over Cßceres, Spain. The top inset image shows how the   
      comet looked through binoculars, while the lower inset shows how the   
      comet looked through a small telescope. The comet is now visible all   
      night long from northern latitudes but will surely fade from easy   
      observation during the next few weeks.   
      
                  Comet ZTF Gallery: Notable Submissions to APOD   
                   Tomorrow's picture: planets real and imagined   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Phillip Newman Specific rights apply.   
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                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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