### Alien Civilization Astrobiogical Copernican Principle Calculator :

Enter the alien civilization calculator its Model selection in mod, Milky Way assumptions and Results in the below calculator.

### Alien Civilization Astrobiological Copernican Principle Formula :

See more useful information about civilizations in the galaxy and how many ETs there really are. You can compare the two samples and it gives the highest number of alien civilizations. Read on for complete details on Alien Civilization. Get the number of stars in the galaxy, the average lifespan of a civilization and other details. Divide the average lifespan of a civilization by the average amount of time it takes for life to develop on the planet. Find the product of the result with the value in step 2 to check the number of civilizations in a Milky Way. The number of intelligent and communicable civilizations in the galaxy N is equal to the total number of stars in the galaxy N_{.(b)} in billion and multiply the Mature stars f_{L(p) } in percent and multiply the Habitable zone f_{Hz(p)} in percent and multiply the lifetime of signals L_{(yrs)} in years and divided by the Available time T_{(by) }in billion years. Hence the Astrobiological Copernican formula can be written as

N= N_{.(b)}* f_{L(p)} *f_{Hz(p)} *F_{m(p)} * (L_{(yrs)} /T_{(by))}

Where;

N= number of intelligent and communicable civillizations in the galaxy

L= average lifetime of an advanced, communicable civilization

f_{Hz} = percentage of stars that host a suitable planet for supporting life

f_{L} = percentage of stars that are at least 5 billion years old

F_{m} = percentage of stars for which there is a sufficient amount of mental resources allowing the formation of advanced biology and communicable civilization

T^{’} = time in which life old exist

### Example:1

Calculate the Number of civilization N? In a Number of stars 250 billion and mature stars 1.5% and Habitable zone 19% Metallicity fm 49.83% available time 1 billion yrs and life time signals L in 100 yrs.

### Answer:

Number of stars N. =250 billion

Mature stars F_{L} =1.5%

Habitable zone (fHz) =19%

Metallicity (fm) = 49.83 %

Available time t =1 billion yrs

Life time of signals L = 100 yrs

N= N_{.(b)}* f_{L(p)} *f_{Hz(p)} *F_{m(p)} * (L_{(yrs)} /T_{(by))}

N = 250 *1.5 *19 *49.83* (100 /1)

N=36 y

Maximum distance to nearest 17,000 light years

The Astrobiological copernican principle model says that there may be 36 advanced alien civilizations out there in the milky way if they are spread out evenly across the milky , way, the maximum distance to our nearest neighbor would be 17,000 light years.

### Example:2

Calculate the Number of civilization? In a Number of stars 150 billion mature stars 84.6% .Habitable zone 26% .Metallicity 48.36% and Available time 5.4 billion yrs and lifetime of signals 100yrs.

### Answer:

Number of stars N. =150 billion

Mature stars F_{L} =84.6%

Habitable zone (fHz) =26%

Metallicity (fm) = 48.36%

Available time t =5.4 billion yrs

Life time of signals L = 100 yrs

N= N_{.(b)}* f_{L(p)} *f_{Hz(p)} *F_{m(p)} * (L_{(yrs)} /T_{(by))}

N = 150 *84.6 *26 *48.36* (100 /5.4)

N=295 y

Maximum distance to nearest 5,880 light years

The Astrobiological copernican principle model says that there may be 295 advanced alien civilizations out there in the milky way if they are spread out evenly across the milky , way, the maximum distance to our nearest neighbor would be 5,880 light years.