SETI - Fraction of those life-bearing planets on which...

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Astronomy 101: SETI (Search for Extra Terrestrial Intelligence) Drake Equations N = R* x F p x F hz x n e x F l x F i x F t x L Number of technological intelligent civilizations now present in the galaxy? Class guesses/Drake’s estimates Rate of star formation = 20/10 Fraction of stars with planetary systems = .4/.5 Fraction of those systems with large, continuously habitable zones = .1/.1 Average number of planets in those continuously habitable zones = 8/2 Fraction of those continuously habitable planets which life arises = .16/1
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Unformatted text preview: Fraction of those life-bearing planets on which intelligence evolves = .1/.02 Fraction of those intelligent-life planets that develop technological society = .006/.01 Average lifetime of a technologically competent civilization = 15000/10000-> Number of technological intelligent civilizations now present in the galaxy = 9.3/10 Doppler, transit,...
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This note was uploaded on 02/13/2012 for the course ASTR 101 taught by Professor Christiansen during the Fall '08 term at UNC.

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