- TL;DR Summary
- Presuming the same CO2, etc. level as today, what would be the rise in the average temperature of Earth due solely to the Sun's future rise in luminosity?
Obviously, at some point, the Sun will be a red giant, and it's going to be very, very hot on Earth. I'd like to know what the expected rise in temperature would be due solely to the Sun, while holding the composition of the Earth's atmosphere constant - or at least constant except for the gas that would be escaping due to the hot temperature.