| MERCURY | VENUS | EARTH | MOON | MARS | JUPITER | SATURN | URANUS | NEPTUNE | PLUTO | |
| Mass (1021tons) | 0.364 | 5.37 | 6.58 | 0.081 | 0.708 | 2093 | 627 | 95.7 | 113 | 0.0138 |
| Diameter (miles) | 3032 | 7521 | 7926 | 2159 | 4222 | 88,846 | 74,897 | 31,763 | 30,775 | 1485 |
| Density (lbs/ft3) | 339 | 327 | 344 | 209 | 246 | 83 | 43 | 79 | 102 | 110 |
| Gravity (ft/s2) | 12.1 | 29.1 | 32.1 | 5.3 | 12.1 | 75.9 | 29.4 | 28.5 | 36.0 | 1.9 |
| Escape Velocity (miles/s) | 2.7 | 6.4 | 7.0 | 1.5 | 3.1 | 37.0 | 22.1 | 13.2 | 14.6 | 0.7 |
| Rotation Period (hours) | 1407.6 | -5832.5 | 23.9 | 655.7 | 24.6 | 9.9 | 10.7 | -17.2 | 16.1 | -153.3 |
| Length of Day (hours) | 4222.6 | 2802.0 | 24.0 | 708.7 | 24.7 | 9.9 | 10.7 | 17.2 | 16.1 | 153.3 |
| Distance from Sun (106 miles) | 36.0 | 67.2 | 93.0 | 0.239* | 141.6 | 483.8 | 890.8 | 1784.8 | 2793.1 | 3647.2 |
| Perihelion (106 miles) | 28.6 | 66.8 | 91.4 | 0.226* | 128.4 | 460.1 | 840.4 | 1703.4 | 2761.6 | 2755.8 |
| Aphelion (106 miles) | 43.4 | 67.7 | 94.5 | 0.252* | 154.9 | 507.4 | 941.1 | 1866.4 | 2824.5 | 4538.7 |
| Orbital Period (days) | 88.0 | 224.7 | 365.2 | 27.3 | 687.0 | 4331 | 10,747 | 30,589 | 59,800 | 90,588 |
| Orbital Velocity (miles/s) | 29.7 | 21.8 | 18.5 | 0.64 | 15.0 | 8.1 | 6.0 | 4.2 | 3.4 | 2.9 |
| Orbital Inclination (degrees) | 7.0 | 3.4 | 0.0 | 5.1 | 1.9 | 1.3 | 2.5 | 0.8 | 1.8 | 17.2 |
| Orbital Eccentricity | 0.205 | 0.007 | 0.017 | 0.055 | 0.094 | 0.049 | 0.057 | 0.046 | 0.011 | 0.244 |
| Axial Tilt (degrees) | 0.01 | 177.4 | 23.5 | 6.7 | 25.2 | 3.1 | 26.7 | 97.8 | 28.3 | 122.5 |
| Mean Temperature (F) | 333 | 867 | 59 | -4 | -85 | -166 | -220 | -320 | -330 | -375 |
| Surface Pressure (atmospheres) | 0 | 91 | 1 | 0 | 0.01 | Unknown* | Unknown* | Unknown* | Unknown* | 0 |
| Number of Moons | 0 | 0 | 1 | 0 | 2 | 39 | 30 | 21* | 8 | 1 |
| Ring System? | No | No | No | No | No | Yes | Yes | Yes | Yes | No |
| Global Magnetic Field? | Yes | No | Yes | No | No | Yes | Yes | Yes | Yes | Unknown |
| MERCURY | VENUS | EARTH | MOON | MARS | JUPITER | SATURN | URANUS | NEPTUNE | PLUTO |
* - See the Fact Sheet Notes
Mission to Mars? A mission?
There is water on Mars, lots of water. When we go to Mars let's go to stay, a settlement, permanent. Enough of this Apollo thinking: a one-off design--it's the least efficient way to accomplish something lasting.