Figure 5
From: Electron cooling by carbon monoxide in the atmospheres of Mars and Venus
Venusian atmospheric densities. Densities [13] measured by Pioneer Venus in '78–'80 of CO2 (○) and CO (◇) and in 1992 for CO2 (●) and CO (△), and an empirical model "VTS3" for CO2 (———) and CO (– – –).