This chart shows the differences between Earth's Moon and Earth. To change the planets/moons being compared, change one or more of the form fields at the bottom and click Refresh.

	Earth's Moon	Earth
Discovered By	Known by the Ancients	Known by the Ancients
Date of Discovery	Unknown	Unknown
Average Orbit Distance	384,400 km	149,597,890 km
Perihelion/Perigee (closest)	363,300 km	147,100,000 km
Aphelion/Apogee (farthest)	405,500 km	152,100,000 km
Equatorial Radius	1737.4 km	6,378.14 km
Equatorial Circumference	10,916 km	40,075 km
Volume	21,970,000,000 km3	1,083,200,000,000 km3
Mass	73,483,000,000,000,000,000,000 kg	5,973,700,000,000,000,000,000,000 kg
Density	3.341 g/cm3	5.515 g/cm3
Surface Area	37,932,330 km2	510,065,700 km2
Equatorial Surface Gravity	1.622 m/s2	9.766 m/s2
Escape Velocity	8,568 km/h	40,248 km/h
Rotation Period (Length of Day)	27.321661 sidereal days	0.99726968 sidereal days
Orbit Period (Length of Year)	0.075 sidereal years	1.0000174 sidereal years
Mean Orbit Velocity	3,682.8 km/h	107,229 km/h
Orbit Eccentricity	0.05490	0.01671022
Orbital Inclination to Ecliptic	5.145 degrees	0.00005 degrees
Equatorial Inclination to Orbit	6.68 degrees	23.45 degrees
Orbital Circumference	2,290,000 km	924,375,700 km
Minimum/Maximum Surface Temperature	-233/123 °C	-88/58 (min/max) °C

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