Life in the Universe
Prof. Scott Gaudi
Jill Tarter (b1944)
Difficulty with 'Skipping to the End'
How many communicating civilizations?
Number of stars in the Galaxy
Fraction of Stars with Planets
Potentially Habitable Planets
Fraction with life?
Fraction with intelligent life?
Lifetime of civilizations
A Wild Guess
Communicating Average Density
Requirement for at least one "conversation" Lifetime > 1700 years
See A Note about Graphics to learn why the graphics shown in the lectures are generally not reproduced with these notes.
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