Planetary Fact Sheet – U.S. Units


   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 0.0144
Diameter (miles) 3032 7521 7926 2159 4221 88,846 74,897 31,763 30,775 1485
Density (lbs/ft3) 339 327 344 209 246 83 43 79 102 118
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) 29.4 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 1.9 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 23.4 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 67 62 27 14 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 

* – See the
Fact Sheet Notes.


Planetary Fact Sheet in Metric Units

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