what planets are habitable i would appreciate any thoughts on what makes a planet habitable for humans i am making asumptions that life and a similar atmosphere evolve given a range of physical aspects of the planet the question is what physical aspects simply disallow earth like conditions eg temperature range of k to k where temp is purely dependant on dist from the sun and the suns temperature atmospheric presure i know nothing of human tolerance planetary mass again gravity at surface is important how much can human bodies take day after day also how does the mass effect atmosphere i thinking of planets between and times mass of the earth i suppose density should be important as well climate etc does not concern me nor does axial tilt etc etc just the above three factors and how they relate to one another jonathan with fearsome eyes and fiery breath the dragon burnt the girl to death from too late saint george
