How to calculate the average temperature of a planet with greenhouse gases?
I am creating a planet with an orange dwarf as its host star and which is at a certain distance from it in such a way that it receives 1 % of the light received by the Earth from the Sun. Obviously, without an atmosphere that has a significant amount of greenhouse gases, the average temperature would be very low, which I don't want. I was thinking of giving the planet an atmosphere with a certain amount of greenhouse gases (CO2 or CH4, for example) to increase the average temperature.
Is there any way to calculate the average temperature that this planet would have considering an atmosphere with x % of a certain greenhouse gas (preferably CO2) and a certain atmospheric pressure? (I don't set these values yet)
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