Random FactsCuriousOneearth, fact, facts, faint, how, paradox, planet, retained, staycurious, Sun, through, water, Young1 Comment

The faint young Sun paradox is the unknown factor of how Planet Earth retained its water through its birth

Random FactsCuriousOneearth, fact, facts, faint, how, paradox, planet, retained, staycurious, Sun, through, water, Young1 Comment
The faint young Sun paradox is the unknown factor of how Planet Earth retained its water through its birth
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The faint young Sun paradox or problem describes the apparent contradiction between observations of liquid water early in Earth's history and the astrophysical expectation that the Sun's output would be only 70 percent 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.[1] Explanations of this paradox have taken into account greenhouse effects, astrophysical influences, or a combination of the two. @Curionic

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