Print Topic - Archive Forum  /  2.3: Extraterrestrial Life  /  Drake Equation & Calculator
Posted by: Weblinks, January 7, 2009, 4:03pm
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 :-/
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