Drake Equatio3 - Drake Equation: How Many Of Them Are Out...

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Drake Equation: How Many Of Them Are Out There? The Drake Equation is a way to estimate the number of communicating advanced civilizations ( N ) inhabiting the Galaxy. It is named after Frank Drake who first summarized the things we need to know to answer the question, "how many of them are out there?" The equation breaks this big unknown, complex question into several smaller (hopefully manageable) parts. Once you know how to deal with each of the pieces, you can put them together to come up with a decent guess. N = R * × f p × n E × f l × f i × f c × L R * = average star formation rate (number of stars formed each year). Roughly 200 billion stars in the Galaxy / 10 billion years of Galaxy's lifetime = 20 stars/year. f p = average fraction of stars with planets. Astronomers are currently focussing on single star systems so planets would more likely have stable orbits. With our current technology it is also easier to find planets around single star systems. They are looking at stars where the
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This note was uploaded on 12/15/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Drake Equatio3 - Drake Equation: How Many Of Them Are Out...

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