Re: Not strong enough
<Does a motlen core from the Sun's gravity allow Venus to hold its atmosphere?
as I understand it, there is little question as to how venus holds it atmosphere. Its exosphere is cooler than ours because of carbon dioxides radiative properties. Furthermore Carbon Dioxides weight means it is a gas that does not escape easily at all from a planet.
I've run the numbers on atmospheric escape myself in fact.
-Justin Kelly