MSGID: 1:153/757.0 7aa1e297   
   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.   
      
                                  2022 October 5   
      
                        Expanding Plume from DART's Impact   
      Video Credit: Les Makes Observatory, J. Berthier, F. Vachier, A. Klotz,   
        P. Thierry, T. Santana-Ros, ESA NEOCC, D. F++hring, E. Petrescu, M.   
                                      Micheli   
      
      Explanation: What happens if you crash a spaceship into an asteroid? In   
      the case of NASA's DART spaceship and the small asteroid Dimorphos, as   
      happened last week, you get quite a plume. The goal of the planned   
      impact was planetary protection -- to show that the path of an asteroid   
      can be slightly altered, so that, if done right, a big space rock will   
      miss the Earth. The high brightness of the plume, though, was   
      unexpected by many, and what it means remains a topic of research. One   
      possibility is that 170-meter wide Dimorphos is primarily a rubble pile   
      asteroid and the collision dispersed some of the rubble in the pile.   
      The featured time-lapse video covers about 20 minutes and was taken   
      from the Les Makes Observatory on France's Reunion Island, off the   
      southeast coast of southern Africa. One of many Earth-based   
      observatories following the impact, the initial dot is primarily   
      Dimorphos's larger companion: asteroid Didymos. Most recently, images   
      show that the Didymos - Dimorphos system has developed comet-like   
      tails.   
      
            DART Impact on Dimorphos: Notable images submitted to APOD   
                          Tomorrow's picture: open space   
        __________________________________________________________________   
      
          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.   
      
   --- BBBS/Li6 v4.10 Toy-6   
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