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	0.985	0.951	1	0.606	0.714	0.241	0.125	0.230	0.297	0.336
Gravity	0.378	0.907	1	0.166	0.377	2.36	0.916	0.889	1.12	0.071
Escape Velocity	0.384	0.926	1	0.213	0.450	5.32	3.17	1.90	2.10	0.116
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	9.57	19.17	30.18	39.48
Perihelion	0.313	0.731	1	0.00247*	1.41	5.04	9.23	18.58	30.40	30.16
Aphelion	0.459	0.716	1	0.00267*	1.64	5.37	9.91	19.73	29.97	48.49
Orbital Period	0.241	0.615	1	0.0748*	1.88	11.9	29.4	83.7	163.7	247.9
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
Obliquity to Orbit	0.001	0.113*	1	0.285	1.07	0.134	1.14	4.17*	1.21	2.58*
Surface Pressure	0	92	1	0	0.01	Unknown*	Unknown*	Unknown*	Unknown*	0.00001
Number of Moons	0	0	1	0	2	95	146	28	16	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 Official: Dave Williams, david.r.williams@nasa.gov
Last Updated: 22 March 2024, DRW