1 9.2720 Solutions for problem set 5 Mercury and the moon have extremely tenuous and transient atmospheres perhaps composed of captured solar wind particles.
Earth has an atmosphere of composed of about nitrogen and oxygen.
Venus s atmosphere is roughly 100x thicker than that of Earth and is motly carbon dioxide. Mars s atmosphere is about 100x thinner and is also CO2. Albedo is the fraction of incident light that is reflected. Fresh snow has a high albedo, bare dirt has a low albedo. IR is absorbed by CO2, H2O, CH4, NH3, etc.