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

	Mars	Mars
Discovered By	Known by the Ancients	Known by the Ancients
Date of Discovery	Unknown	Unknown
Average Orbit Distance	227,943,824 km	227,943,824 km
Perihelion (closest)	206,655,215 km	206,655,215 km
Aphelion (farthest)	249,232,432 km	249,232,432 km
Equatorial Radius	3,389.5 km	3,389.5 km
Equatorial Circumference	21,296.9 km	21,296.9 km
Volume	163,115,609,799 km3	163,115,609,799 km3
Mass	641,693,000,000,000,000,000,000 kg	641,693,000,000,000,000,000,000 kg
Density	3.934 g/cm3	3.934 g/cm3
Surface Area	144,371,391 km2	144,371,391 km2
Equatorial Surface Gravity	3.71 m/s2	3.71 m/s2
Escape Velocity	18,108 km/h	18,108 km/h
Rotation Period (Length of Day)	1.026 sidereal days	1.026 sidereal days
Orbit Period (Length of Year)	1.8808476 sidereal years	1.8808476 sidereal years
Mean Orbit Velocity	86,677 km/h	86,677 km/h
Orbit Eccentricity	0.0933941	0.0933941
Orbit Inclination to Ecliptic	1.85 degrees	1.85 degrees
Equatorial Inclination to Orbit	25.2	25.2
Orbit Circumference	1,429,085,052 km	1,429,085,052 km
Minimum/Maximum Surface Temperature	-87 to -5 °C	-87 to -5 °C
Atmospheric Constituents	Carbon Dioxide, Nitrogen, Argon	Carbon Dioxide, Nitrogen, Argon