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nges, the fraction of all planets in the habitable zone. Life Sustaining Changes f, the fraction of planets in habitable zone on which life actually evolves. Intelligent Life: Changes f, the fraction of times where life evolves in which it evolves to be intelligent. Lifetime: Changes to the lifetime of a typical civilization measured as a fraction of a star's lifetime (typically 1010 years). As the number of civilizations increases, the number of blue dots shown on the galaxy image increases. 1st attempt The first three parameters in the Drake equation have values that have been estimated from astronomical observations to be N -4.00×10¹1, N₂-300, and/-0.300. Imagine we want to be optimistic and assume that almost all habitable planets develop life (-1.000) and about 1% of life-bearing worlds develop intelligent life (-0.01). What fraction of a star's lifetime, fo would a civilization have to survive in order for there to be about a million (1x 10) civilizations in the galaxy?

nges, the fraction of all planets in the habitable zone. Life Sustaining Changes f, the fraction of planets in habitable zone on which life actually evolves. Intelligent Life: Changes f, the fraction of times where life evolves in which it evolves to be intelligent. Lifetime: Changes to the lifetime of a typical civilization measured as a fraction of a star's lifetime (typically 1010 years). As the number of civilizations increases, the number of blue dots shown on the galaxy image increases. 1st attempt The first three parameters in the Drake equation have values that have been estimated from astronomical observations to be N -4.00×10¹1, N₂-300, and/-0.300. Imagine we want to be optimistic and assume that almost all habitable planets develop life (-1.000) and about 1% of life-bearing worlds develop intelligent life (-0.01). What fraction of a star's lifetime, fo would a civilization have to survive in order for there to be about a million (1x 10) civilizations in the galaxy?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
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Stars: Changes N,, the number of stars in the galaxy Planets: Changes N₁, the average number of planets per star Habitable Zone: Changes f, the fraction of all planets in the habitable zone Life Sustaining: Changes, the fraction of planets in the habitable zone on which life actually evolves Intelligent Life: Changes, the fraction of times where life evolves in which it evolves to be intelligent Lifetime: Changes f, the lifetime of a typical civilization measured as a fraction of a star's lifetime (typically 10¹0 years) As the number of civilizations increases, the number of blue dots shown on the galaxy image increases.
Transcribed Image Text:Stars: Changes N,, the number of stars in the galaxy Planets: Changes N₁, the average number of planets per star Habitable Zone: Changes f, the fraction of all planets in the habitable zone Life Sustaining: Changes, the fraction of planets in the habitable zone on which life actually evolves Intelligent Life: Changes, the fraction of times where life evolves in which it evolves to be intelligent Lifetime: Changes f, the lifetime of a typical civilization measured as a fraction of a star's lifetime (typically 10¹0 years) As the number of civilizations increases, the number of blue dots shown on the galaxy image increases.
nges, the fraction of all planets in the habitable zone. Life Sustaining: Changes f, the fraction of planets in habitable zone on which life actually evolves. Intelligent Life: Changes f, the fraction of times where life evolves in which it evolves to be intelligent. Lifetime: Changes to the lifetime of a typical civilization measured as a fraction of a star's lifetime (typically 1010 years). As the number of civilizations increases, the number of blue dots shown on the galaxy image increases. 1st attempt The first three parameters in the Drake equation have values that have been estimated from astronomical observations to be N -4.00×10¹1, N-300, and f-0.300. Imagine we want to be optimistic and assume that almost all habitable planets develop life (-1.000) and about 1% of life-bearing worlds develop intelligent life (-0.01). What fraction of a star's lifetime, fo would a civilization have to survive in order for there to be about a million (1x 10) civilizations in the galaxy?
Transcribed Image Text:nges, the fraction of all planets in the habitable zone. Life Sustaining: Changes f, the fraction of planets in habitable zone on which life actually evolves. Intelligent Life: Changes f, the fraction of times where life evolves in which it evolves to be intelligent. Lifetime: Changes to the lifetime of a typical civilization measured as a fraction of a star's lifetime (typically 1010 years). As the number of civilizations increases, the number of blue dots shown on the galaxy image increases. 1st attempt The first three parameters in the Drake equation have values that have been estimated from astronomical observations to be N -4.00×10¹1, N-300, and f-0.300. Imagine we want to be optimistic and assume that almost all habitable planets develop life (-1.000) and about 1% of life-bearing worlds develop intelligent life (-0.01). What fraction of a star's lifetime, fo would a civilization have to survive in order for there to be about a million (1x 10) civilizations in the galaxy?
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