Planetary Fact Sheet
U.S. Units

David R. Williams, NASA
December 23, 2016


   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 0.0161
Diameter (miles) 3032 7521 7926 2159 4221 88,846 74,897 31,763 30,775 1464
Density (lbs/ft3) 339 327 344 209 246 83 43 79 102 131
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* 141.6 483.8 890.8 1784.8 2793.1 3670.0
Perihelion (106 miles) 28.6 66.8 91.4 0.226* 128.4 460.1 840.4 1703.4 2761.6 2756.9
Aphelion (106 miles) 43.4 67.7 94.5 0.252* 154.9 507.4 941.1 1866.4 2824.5 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 1.9 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
Obliquity to Orbit (degrees) 0.034 177.4 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* 0.00001
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

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

NASA
Author/Curator:
Dr. David R. Williams, [email protected]
NSSDCA, Mail Code 690.1
NASA Goddard Space Flight Center
Greenbelt, MD 20771
+1-301-286-1258

NASA Official: Dr. David R. Williams, [email protected]
Last Updated: 07 June 2017, DRW


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Source: NASA / Dr. David R. Williams

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