N = R* · f_p · n_e · f_l · f_i · f_c · L: expected number of communicating civilisations in our Galaxy as a product of astrophysical (R*, f_p, n_e), biological (f_l, f_i), and sociological (f_c, L) factors. Most factors remain uncertain by…
N = R* · f_p · n_e · f_l · f_i · f_c · L: expected number of communicating civilisations in our Galaxy as a product of astrophysical (R*, f_p, n_e), biological (f_l, f_i), and sociological (f_c, L) factors. Most factors remain uncertain by…