The Azimuth Project
Faint young Sun (Rev #2)



The faint young sun paradox is about the question why Earth did not freeze over when the sun was much dimmer some billions of years ago.

Quoting Georg Feulner (abstract of the review paper in the references):

For the early Earth, models of stellar evolution predict a solar energy input to the climate system which is about 25% lower than today. This would result in a completely frozen world over the first two billion years in the history of our planet, if all other parameters controlling Earth’s climate had been the same.

Research about this topic could turn out to be crucial to an understanding of today’s climate.


A recent review paper: