ASTR 20 Lecture Notes - Lecture 14: Exoplanet, Social Darwinism
Document Summary
Darwin origin of species: mechanism for evolution is natural selection, new variants continuously arose within populations, numerous instances of selecting the variant slowly leads to species modification/diversification. Favorable variations drive evolution: if certain variants will be preserved over time then certain species will change by evolving to those variants. Advancement of the mean is dangerous and erroneous concept. Remove unfit variants as they arise randomly via mutation. Natural selection prevents unfit genes from increasing frequency in the gene pool. Not only was survival of the fittest natural but it was morally correct. It was morally incorrect to assist those weaker than oneself because it promoted. Social darwinism the survival of a species that was unfit. Government is not there to help people but support business. N(s) - number of stars in galaxy. F(s-p) fraction of stars with planets. F(p-e) fraction of planets that are earth like. F(p-l) fraction of earthlike planets that develop life.
