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 0.0138

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 79 102 110

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) 29.7 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 23.5 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 63 60 27 13 3

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

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

	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	0.0138
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	110
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)	29.7	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	23.5	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	63	60	27	13	3
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

Planetary Fact Sheet - U.S. Units

NASA Official: Ed Grayzeck, edwin.j.grayzeck@nasa.gov Last Updated: 29 November 2007, DRW

NASA Official: Ed Grayzeck, edwin.j.grayzeck@nasa.gov
Last Updated: 29 November 2007, DRW