NATS 1880 Chapter Notes - Chapter 10: The Faint, Glacial Motion, Solar Wind
11 Jan 2018
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Chapter 10: the nature and evolution of habitability. Habitable zone (hz) volume within which a planet (similar to earth) could have surface temperatures that permit liquid water on its surface: conditions are necessary (we think) but not sufficient to make a world habitable (e. g. , One has an albedo of zero one has an albedo of 1. Perfectly reflecting mirror would have an albedo of 1. ** habitable zone is somewhere where liquid water could be present. Venus: earth and possibly mars are in the hz, venus is not at this point, hottest surface in the solar system, why is venus now so hot, earth and venus were quite similar when they formed. Earth would be warm up by just 30 degrees. The faint young sun paradox: early in earth"s history, the sun was only 70% as bright as it is now which would have led to frozen oceans with today"s atmosphere.
