NATS 1880 Chapter Notes - Chapter 10: Faint Young Sun Paradox, Runaway Greenhouse Effect, Carbon Cycle
Document Summary
Nats1880 chapter 10: the nature and evolution of habitability . Volume within which a planet could have surface temperatures that permit liquid water on its surface. Observations only permit an assessment of surface life not subsurface life. Temperature of a planet depends on its: distance from its host star, albedo (proportion of radiation it reflects, atmosphere (greenhouse effect, internal heat (primordial, tidal or radioactive, tilt of rotation axis and rotation rate. Technically, simple life can exist outside the haitable zone. Free-floating earths a planet with significant internal hear or that is ejected from a star"s system with an h atmosphere during formation. May be possible to substitute another liquid medium apart from water with much lower freezing point ex. possible ethane lake on titan. Earth and possible mars are in the hz. But venus is not because it has a very high surface temperature.
