PLANETARY DETAILS


               MEAN DISTANCE                ORBITAL
                 FROM SUN      DIAMETER      PERIOD
               (Millions of   (Thousands   (Earth=1)
                  miles)       of miles)
Mercury             36             3           .24
Venus               87             7.7         .61
Earth               93             7.9        1.00
Mars               143             4.2        1.88
Jupiter            483            88.7       11
Saturn             886            75.1       29
Uranus           1,783            29.7       84
Neptune          2,793            31.0      164
Pluto            3,666             4        247