Mean distance from Sun. Period Velocity Class. Name. Earth's In millions of revolution. in orbit. Eccentricity. distance of miles. In years. Miles per =1. sec. Terrestrial Mercury 0.387 36.0 0.24 29.7 0.2056 Planets Venus 0.723 67.2 0.62 21.9 0.0068 Earth 1.000 92.9 1.00 18.5 0.0168 Mars 1.524 141.5 1.88 15.0 0.0933 Minor Eros 1.458 135.5 1.76 15.5 0.2228 Planets Ceres 2.767 257.1 4.60 11.1 0.0763 Achilles 5.253 488.0 12.04 8.1 0.0509 Major Jupiter 5.203 483.3 11.86 8.1 0.0483 Planets Saturn 9.539 886.6 29.46 6.0 0.0561 Uranus 19.183 1781.9 84.02 4.2 0.0463 Neptune 30.055 2791.6 164.78 3.4 0.0090 {57} Mean diameter. Surface. Volume. Mass. Name. Symbol. In miles. [Earth]=1. [Earth]=1. [Earth]=1. [Earth]=1. Sun [Sun] 866400 109.422 11973. 1310130. 332000. Moon [Moon] 2163 0.273 0.075 0.02 0.012 Mercury [Mercury] 3030 0.383 0.147 0.06 0.048 Venus [Venus] 7700 0.972 0.945 0.92 0.820 Earth [Earth] 7918 1.000 1.000 1.00 1.000 Mars [Mars] 4230 0.534 0.285 0.15 0.107 Jupiter [Jupiter] 86500 10.924 119.3 1304. 317.7 Saturn [Saturn] 73000 9.219 85.0 783. 94.8 Uranus [Uranus] 31900 4.029 16.2 65. 14.6 Neptune [Neptune] 34800 4.395 19.3 85. 17.0 {58} Light Gravity. and heat Albedo; Density. Fall in received _i.e._ re- [Earth] Water [Earth] feet per from Sun. Time of rotation flecting Name. =1. =1. =1. sec. [Earth]=1. on axis. power. d. h. m. Sun 0.25 1.39 27.65 444.60 ... 25 4 48 ± ... Moon 0.61 3.39 0.17 2.73 1.00 27 7 43 0.17