Which of the following factors in the simplified Drake equation is best known?
A) Nhp, the number of habitable planets in our galaxy
B) fcᵢᵥ, fraction of life-bearing planets where intelligent civilizations have arisen at any time
C) fnₒw, fraction of civilization-bearing planets that have intelligent civilizations on them now
D) flᵢfₑ, fraction of life-bearing habitable planets
Correct Answer:
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Q2: It is unlikely that we will be
Q3: Given that there are several hundred billion
Q4: The Drake equation allows us to estimate
Q5: The rare-Earth hypothesis would predict that the
Q6: Suppose that there are 10 billion (10,000,000,000,000)
Q7: Which of the following factors in the
Q8: The factor fnₒw, in the Drake equation
Q9: How is intelligence defined in the Drake
Q10: Which of the following cases in the
Q11: If the communication lifetime of civilizations in
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