Chapter 1. The Drake Equation

The Drake Equation

Interactive Exercise

Question

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{"title":"Fraction of stars that have planets","description":"","type":"correct","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"178,1,215,53\"}]"} {"title":"Lifetime of a technologically advanced civilization","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"384,1,414,43\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"} {"title":"Number of technologically advanced civilizations in the Galaxy whose messages we might be able to detect","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"7,2,51,44\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"} {"title":"Fraction of Earthlike planets on which life arises","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"265,2,301,51\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"}

Question

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{"title":"Fraction of stars that have planets","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"178,1,215,53\"}]"} {"title":"Lifetime of a technologically advanced civilization","description":"","type":"correct","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"384,1,414,43\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"} {"title":"Number of technologically advanced civilizations in the Galaxy whose messages we might be able to detect","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"7,2,51,44\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"} {"title":"Fraction of Earthlike planets on which life arises","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"265,2,301,51\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"}

Question

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{"title":"Fraction of stars that have planets","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"178,1,215,53\"}]"} {"title":"Lifetime of a technologically advanced civilization","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"384,1,414,43\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"} {"title":"Number of technologically advanced civilizations in the Galaxy whose messages we might be able to detect","description":"","type":"correct","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"7,2,51,44\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"} {"title":"Fraction of Earthlike planets on which life arises","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"265,2,301,51\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"}

Question

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{"title":"Fraction of stars that have planets","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"178,1,215,53\"}]"} {"title":"Lifetime of a technologically advanced civilization","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"384,1,414,43\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"} {"title":"Number of technologically advanced civilizations in the Galaxy whose messages we might be able to detect","description":"Incorrect. Try again.","type":"incorrect","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"7,2,51,44\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"} {"title":"Fraction of Earthlike planets on which life arises","description":"","type":"correct","color":"#c0c0c0","code":"[{\"shape\":\"rect\",\"coords\":\"265,2,301,51\"},{\"shape\":\"rect\",\"coords\":\"411,52,414,54\"}]"}

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