Henry Henry
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Biografía
- N = R∗ x fp x ne x fl x fi x Fc x LN = R∗ x fp x ne x fl x fi x Fc x L N = the number of civilizations in our galaxy with which communication might be possible (i.e. which are on our current past light cone) R∗ = the average rate of star formation in our galaxy fp = the fraction of those stars that have planets ne = the average number of planets that can potentially support life per star that has planets fl = the fraction of planets that could support life that actually develop life at some point fi = the fraction of planets with life that actually go on to develop intelligent life (civilizations) fc = the fraction of civilizations that develop a technology that releases detectable signs of their existence into space L = the length of time for which such civilizations release detectable signals into space[