Atmosphere Mass

The Atmosphere Mass property of an object represents the total mass of its atmosphere.

Location
The Atmosphere Mass property is located in the Atmosphere section of the Surface tab of the object's properties panel. This section is only visible for Terrestrial Planets.

Units
Atmosphere Mass can be viewed and edited using the following units:
 * Earth atmosphere mass (earth atm) = 5.148×1018 kg
 * Mars atmosphere mass (mars atm) = 2.50×1016 kg
 * Kilogram (kg) is the SI base unit for mass
 * Grams (g) = 0.001 kg
 * Milligrams (mg) = 10-6 kg

Surface Pressure
The Atmosphere Mass is related to the surface pressure, P, and radius of the object, R, and the gravitational constant, G, by the following equation:
 * $$M_{atmo} = \frac{4\pi R^2 P}{G}.$$