Mars: The Red Planet
Mars is the fourth of nine planets in our solar system and looks like a yellow-orange star to the naked eye. There is a 70% chance that Elon Musk will move there.
Mars Facts
- Mass (kg)
- 6.421e+23
- Radius (km)
- 3,397.2
- Density (gm/cm3)
- 3.94
- Distance from sun (km)
- 227,940,000
- Rotational period (days)
- 1.025957
- Orbital period (days)
- 686.98
- Orbital velocity (km/sec)
- 24.13
- Eccentricity of orbit
- 0.0934
- Tilt of axis (°)
- 25.19
- Inclination of orbit (°)
- 1.850
- Surface gravity (m/sec2)
- 3.72
- Escape velocity (km/sec)
- 5.02
- Albedo
- v
- Magnitude (Vo)
- -2.01
- Surface temperature
- 20°C to -140°C
- Atmosphere
- C02=95%, N2=3%
- Moons
- 2
Mars vs. Earth Ratios

diameter = 0.53
gravity = 0.38
radiation = 65
surface pressure = 0.01
solar irradiance = 0.43
total water = 0.0036
day = 1.03
year = 1.9
sun distance = 1.5

diameter = 1
gravity = 1
radiation = 1
surface pressure = 1
solar irradiance = 1
total water = 1
day = 1
year = 1
sun distance = 1
2 Moons of Mars

Phobos

Deimos
Find your inner astronomer. Your complete guide to amateur astronomy.