Planet Position distance year diameter(Earth=1) diameter(km) mass(Earth=1) mean.distance.from.Sun.(AU) orbital.eccentricity mean.orbital.velocity(km/sec) rotation.period.(Earth.days) axis.inclination mean.surface.temp(C) gravity at equator (Earth=1) mean.density.(water=1) atmosphere moons Mercury 1 36.254400 0.24 0.382 4878 0.055 0.39 0.2056 47.89 58.65 0.0 -180 to 430 0.38 5.43 none 0 Venus 2 66.931200 0.62 0.949 12104 0.815 0.72 0.0068 35.03 -243* 177.4 465 0.9 5.25 CO2 0 Earth 3 92.960000 1 1 12756 1 1 0.0167 29.79 1 23.45 -89 to 58 1 5.52 N2 + O2 1 Mars 4 141.29920 1.88 0.532 6787 0.107 1.52 0.0934 24.13 1.03 23.98 -82 to 0 0.38 3.93 CO2 2 Jupiter 5 483.39200 11.86 11.209 142800 318 5.20 0.0483 13.06 0.41 3.08 -150 2.64 1.33 H2+He 67 Saturn 6 886.83840 29.46 9.44 120000 95 9.54 0.0560 9.64 0.44 26.73 -170 0.93 0.71 H2+He 62 Uranus 7 1782.9728 84.01 4.007 51118 15 19.18 0.0461 6.81 -0.72* 97.92 -200 0.89 1.24 H2+He 27 Neptune 8 2794.3776 164.8 3.883 49528 17 30.06 0.0097 5.43 0.72 28.8 -210 1.12 1.67 H2+He 14 Pluto 9 3671.9200 248 2374 39.5