Planetary Fact Sheet - Ratio to Earth Values


   MERCURY   VENUS   EARTH   MOON   MARS   JUPITER   SATURN   URANUS   NEPTUNE   PLUTO 
Mass 0.0553 0.815 1 0.0123 0.107 317.8 95.2 14.5 17.1 0.0022
Diameter 0.383 0.949 1 0.2724 0.532 11.21 9.45 4.01 3.88 0.187
Density 0.984 0.951 1 0.605 0.713 0.240 0.125 0.230 0.297 0.332
Gravity 0.378 0.907 1 0.166 0.377 2.36 0.916 0.889 1.12 0.059
Escape Velocity 0.384 0.926 1 0.213 0.450 5.32 3.17 1.90 2.10 0.098
Rotation Period 58.8 -244 1 27.4 1.03 0.415 0.445 -0.720 0.673 6.41
Length of Day 175.9 116.8 1 29.5 1.03 0.414 0.444 0.718 0.671 6.39
Distance from Sun 0.387 0.723 1 0.00257* 1.52 5.20 9.58 19.20 30.05 39.24
Perihelion 0.313 0.731 1 0.00247* 1.41 5.03 9.20 18.64 30.22 30.15
Aphelion 0.459 0.716 1 0.00267* 1.64 5.37 9.96 19.75 29.89 48.02
Orbital Period 0.241 0.615 1 0.0748 1.88 11.9 29.4 83.7 163.7 248.0
Orbital Velocity 1.59 1.18 1 0.0343 0.808 0.439 0.325 0.228 0.182 0.157
Orbital Eccentricity 12.3 0.401 1 3.29 5.60 2.93 3.38 2.74 0.677 14.6
Axial Tilt 0.0004 0.113* 1 0.285 1.07 0.134 1.14 4.17* 1.21 2.45*
Surface Pressure 0 92 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

Planetary Fact Sheet in U.S. Units

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 Logo]
Author/Curator:
Dr. David R. Williams, dave.williams@nasa.gov
NSSDC, Mail Code 690.1
NASA Goddard Space Flight Center
Greenbelt, MD 20771
+1-301-286-1258


NASA Official: Ed Grayzeck, edwin.j.grayzeck@nasa.gov
Last Updated: 25 April 2014, DRW