E.T. Counter Calculates the number of inhabited planets and advanced civilizations
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calculate calculation Counter Parameter Calculator calculation algorithm variable calculator

E.T. Counter Description

The E.T. Counter application was developed to be a small tool that roughly calculates the number of inhabited planets and advanced civilizations that currently exist in our galaxy, based on your own specifications and assumptions. It relies on estimated percentages, probabilities and average values. The algorithm is inspired by Isaac Asimov's book "Extraterrestrial Civilizations" and the Green Bank formula. All variables that are to be specified by the user are named according to the corresponding program step and their relative position in this step. For example, "45" is the fifth variable specified in step 4 (=the average size of galaxies relative to ours). Furthermore the following acronyms are used in the equations: RSSE: Number of "relevant" single stars with a suitable ecosphere RSM: Number of "relevant" stars that belong to a multiple star system RSME: Number of "relevant" stars with a suitable that belong to a multiple star system RS: Total number of "relevant" stars with a suitable ecosphere (as explained at the beginning of step 3) IP: Number of currently inhabited planets in our galaxy DIP: Average distances between neighboring inhabited planets N: Number of currently existing advanced civilizations in our galaxy DN: Average distances between neighboring advanced civilizations NU: Number of advanced civilizations in the universe

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