Drake Equation & Calculator September 19, 2017, 6:43pm
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January 7, 2009, 4:03pm Report to Moderator Report to Moderator


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The following web page outlines the Drake equation and provides an on-screen calculator where you can experiment with different values:

N* = the number of stars in the Milky Way galaxy:
fp = fraction of stars with planets around them:
ne = number of planets per star ecologically able to sustain life:
fl = fraction of those planets where life actually evolves:
fi = the fraction of fl that evolves intelligent life:
fc = the fraction of fi that communicates:
fL = the fraction of the planet's life during which the communicating civilizations survives:


However, the real issue is whether really have any idea of the actual numbers for the last 4 items
http://www.activemind.com/Mysterious/Topics/SETI/drake_equation.html
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