Faint Young Sun Paradox Resolved

via Current News – Principia Scientific International
http://ift.tt/1kjWLPW

The faint young Sun paradox describes the apparent contradiction between observations of liquid water early in the Earth’s history and the astrophysical expectation that the Sun’s output would be only 70% as intense during that epoch as it is during the modern epoch. The issue was raised by astronomers Carl Sagan and George Mullen in 1972.

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via Current News – Principia Scientific International http://ift.tt/1kjWLPW

April 15, 2017 at 01:41AM