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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 July 13   
      
                           Solar System Family Portrait   
                        Image Credit: Voyager Project, NASA   
      
      Explanation: In 1990, cruising four billion miles from the Sun, the   
      Voyager 1 spacecraft looked back to make this first ever Solar System   
      family portrait. The complete portrait is a 60 frame mosaic made from a   
      vantage point 32 degrees above the ecliptic plane. In it, Voyager's   
      wide-angle camera frames sweep through the inner Solar System at the   
      left, linking up with ice giant Neptune, the Solar System's outermost   
      planet, at the far right. Positions for Venus, Earth, Jupiter, Saturn,   
      Uranus, and Neptune are indicated by letters, while the Sun is the   
      bright spot near the center of the circle of frames. The inset frames   
      for each of the planets are from Voyager's narrow-field camera. Unseen   
      in the portrait are Mercury, too close to the Sun to be detected, and   
      Mars, unfortunately hidden by sunlight scattered in the camera's   
      optical system. Closer to the Sun than Neptune at the time, small,   
      faint Pluto's position was not covered. In 2024 Voyager 1, NASACÇÖs   
      longest-running and most-distant spacecraft, is some 15 billion miles   
      away, operating in interstellar space.   
      
                    Tomorrow's picture: galaxy vs grain of sand   
        __________________________________________________________________   
      
          Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)   
               NASA Official: Amber Straughn Specific rights apply.   
                      NASA Web Privacy, Accessibility Notices   
                         A service of: ASD at NASA / GSFC,   
                              NASA Science Activation   
                                & Michigan Tech. U.   
      
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