The Drake Equation 1961 Frank Drake summarized the factors that
{"Image DocumentName": "The Drake Equation 1961 Frank Drake summarized the factors that", "Image ImageDescription": "would determine whether any attempt to find. intelligent ETs would be successful. Equation to calculate the number of civilizations in our. galaxy that we could potentially receive a signal. N = R  x fPlanet x ne x fLife x fIntelligence x fCivilizations x L. N = the number of transmitting/communicating civilizations. R  = galactic birthrate of G/K/M type stars suitable for hosting life (~10/year) fPlanet = the fraction of such stars having planets. ne = the number of those planets that are habitable. fLife = fraction of those planets on which life originated/evolved. fIntelligence = the fraction of inhabited worlds that developed intelligent life. fCivilizations = the fraction of inhabited worlds that developed civilizations. capable of interstellar communication. L = lifetime of those communicating civilizations. This is a simple equation, but most of the variables are unknown. Get a huge range for N. Power. can use to constrain our most optimistic and pessimistic estimates. -allows us to identify where we need more data/knowledge.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}