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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.
- Fall '08