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The Solar System


The planet information center offers you basic information on the members of the solar system.  All photos are from NASA and are considered public domain. Visit The Nine Planets for more information and photos for each planet.

distances in millions of km, except where noted.
Mercury Venus Earth Moon Mars Asteroids Jupiter Saturn Uranus Neptune Pluto
Max Distance from Sun 69.7 109.0 152.2   249.1   815.7 1,507 3,004 4,537 7,375
Min Distance from Sun 45.9 107.4 147.1   206.7   740.9 1,347 2,735 4,456 4,425
Mean Distance from Sun 57.9 108.2 149.6 384,400 km1 227.9   778.3 1,427 2,869.6 4,496.6 5,900
Semi-major Axis of Orbit, AU 0.387 0.723 1.0 1.0 1.524 ~2.8 5.2013 9.538 19.18 30.06 39.52
Orbit Eccentricity 0.2056 0.0068 0.0167   0.0934   0.0485 0.056 0.0472 0.0086 0.25
Orbit Inclination to Ecliptic, degrees 7.0 3.39 0.0   1.85   1.3 2.49 0.77 1.77 17.2
Sidereal Period of Revolution 88d 224.7d 365.26d 27.322d2 687d   11.86y 29.46y 84.01y 164.8y 247.7y
Sidereal Rotation Period, days 59.0 -243.02 0.9972697 27.322 1.026   0.413 0.444 0.718 0.671 -6.4
Orbital Velocity, km/s 47.9 35.0 29.8 29.8 24.1   13.1 9.6 6.8 5.4 4.7
Inclination of Axis, Degrees 2 177.3 23.45 6.68 25.2   3.1 26.7 97.9 30.2 117.6
Equatorial Radius, km 2440 6057 6378 1738 3393   71,398 60330 26071 24764 1150
Mass, Earth = 1 0.05528 0.815 1.0 0.0123 0.1074468   317.89 95.18 14.54 17.15 0.0022
Density, kg/m3 5430 5245 5515 3341 3935 3,7003 1327 688 1272 1640 2080
Zero-pressure Density, kg/m3 5280 3990 4060 3315 3730 3,7003         2070
Oblateness4 0.0 0.0 0.003353 0.002 0.0074
0.0051?		   0.065 0.098 0.024 0.022 ?
Moment of Inertia [/mr2]     0.3307 0.391 0.365            
Atmosphere, Main Components none CO2, N2 N2, O2, Ar none CO2,N2, Ar   H2, He H2, He H2, He, CH4 H2, He, CH4 N2, CH4, CO
Mean Surface Temp, oC, Visible Surface [sSolid, cClouds] 167, 350 days 170 nites

-33c

457s

 14s   -55s   -150c -180c -210c -220c -230?
Atmos. Press., Surface, millibars 10-9 90,000 1,000   6.0            
Surface Grav, Earth = 1 0.37 0.88 1.0   0.38   2.64 1.15 0.9 1.18 0.069
Mean Apparent Diam. of Sun as Seen from Planet 1o22'40" 44'15" 31'59"   21'   6'09" 3'22" 1'41" 1'04" 49"
Known Satellites 0 0 1   2   16 18 15 8 1
Image View View View View View View View View View View View

1. Mean Distance from Earth

2. Period of Revolution About Earth

3. Average of Observed Falls

4. From Lowrie, Fundamentals Of Geophysics

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