Basic Model and General Approach

As Chapter 12 shows, the General Basic Model can be regarded as equivalent to the General Approach 12.2.2.
For this to be exactly the case, both equations must be equivalent to each other.

General approach:	N_ziv = A · F_ph · F_k· F_Liz
General basic model:	N_zexGal = A · F_ph · F_gae· F_Liz

It must then apply:

N_ziv	= N_zexGal
A · F_ph · F_k· F_Liz	= A · F_ph · F_gae· F_Liz

As a result:

12.5.1 Equation

F_k= F_gae

The probability F_gae for the Earth similarity must be of the same order of magnitude as the observation probabilities F_k, so that the models are equivalent.

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Probabilities in the Galaxy

A Distribution Model for habitable Planets

12.5 - Basic Model and General Approach


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