| MERCURY | VENUS | EARTH | MOON | MARS | JUPITER | SATURN | URANUS | NEPTUNE | PLUTO | |
| Mass1 (1021tons) | 0.364 | 5.37 | 6.58 | 0.081 | 0.707 | 2092 | 626 | 95.7 | 113 | 0.0144 |
| Diameter (miles) | 3032 | 7521 | 7926 | 2159 | 4221 | 88,846 | 74,897 | 31,763 | 30,775 | 1476 |
| Density1 (lbs/ft3) | 339 | 327 | 344 | 209 | 246 | 83 | 43 | 79 | 102 | 116 |
| Gravity (ft/s2) | 12.1 | 29.1 | 32.1 | 5.3 | 12.1 | 75.9 | 29.4 | 28.5 | 36.0 | 2.3 |
| Escape Velocity (miles/s) | 2.7 | 6.4 | 7.0 | 1.5 | 3.1 | 37.0 | 22.1 | 13.2 | 14.6 | 0.8 |
| 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 | 483.7 | 889.8 | 1781.5 | 2805.5 | 3670.0 |
| Perihelion (106 miles) | 28.6 | 66.8 | 91.4 | 0.226* | 128.4 | 460.2 | 843.5 | 1698.0 | 2778.2 | 2756.9 |
| Aphelion (106 miles) | 43.4 | 67.7 | 94.5 | 0.252* | 154.9 | 507.3 | 936.1 | 1865.0 | 2832.7 | 4583.2 |
| Orbital Period (days) | 88.0 | 224.7 | 365.2 | 27.3* | 687.0 | 4331 | 10,747 | 30,589 | 59,800 | 90,560 |
| Orbital Velocity (miles/s) | 29.4 | 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 | 1.8 | 1.3 | 2.5 | 0.8 | 1.8 | 17.2 |
| Orbital Eccentricity | 0.206 | 0.007 | 0.017 | 0.055 | 0.094 | 0.049 | 0.052 | 0.047 | 0.010 | 0.244 |
| Obliquity to Orbit (degrees) | 0.034 | 177.4 | 23.4 | 6.7 | 25.2 | 3.1 | 26.7 | 97.8 | 28.3 | 119.5 |
| 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* | 0.00001 |
| Number of Moons | 0 | 0 | 1 | 0 | 2 | 95 | 146 | 28 | 16 | 5 |
| 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 |
1 Note that the U.S. ton and pound is are units of weight, not mass, but are used here as the mass equivalent of 907.1847 kilograms/ton and 0.4535929 kg/pound.
* - See the Fact Sheet Notes.
Planetary Fact Sheet in Metric Units
Planetary Fact Sheet - Values compared to Earth
Index of Planetary Fact Sheets - More detailed fact sheets for each planet
Notes on the Fact Sheet - Explanations of the values and headings in the fact sheet
Schoolyard Solar System
- Demonstration scale model of the solar system for the classroom
Author/Curator: