Probabilities in the Galaxy
A Distribution Model for habitable Planets
Copyright © Klaus Piontzik Claude Bärtels

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9.4 - The modified Drake-Equation

However, there are still the following points of criticism about the Drake equation:

The factor n represents the number of habitable planets. In our solar system there are three habitable planets. And only one has life. The triple number of habitable planets does not mean that there are three times as many civilizations. Basically, you're just looking for a planet with a civilization. The factor n is therefore 1 and can therefore be omitted.

The factor fc can also be set to 1. If fc = 0.5, this only means that half of civilizations do not want to communicate. But that doesn't make it any less civilizations. The factor fc can also be neglected.

This allows to modify the Drake equation. The modified Drake equation is:

9.4.1 Equation N = R · fp · fL · fi · L


And after transformation into the formula symbols of the basic model:

9.4.2 Equation N = R · Fp · FL · Fiz · L

This is how the "modified Drake equation" can be formulated:

9.4.3 Equation N = R · Fp · FLiz · L

 

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