JUPITER   Fifth planet from the Sun

          Mean distance from Sun:    5.20 AU = 778,000,000 KM

          Diameter:                  143,800 KM

          Mass:                      317.89 Earths

          Density:                   1.3 grams / cubic centimeter

          Surface temperature:       -200 F

          Orbital period:            11 years, 321 days
        
          Jupiter is the Solar System's largest planet - its
          composition is more like a star than a planet.  Bright belts, 
          changing cloud structures, four main moons (each larger than 
          Earth's satellite) and the Great Red Spot are all easily 
          visible in small telescopes.
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