Multiple Choice
The estimates in the Drake equation are not constant but evolve over time based on increased observational evidence.Because of the discovery of over a thousand extrasolar planets,the text chose the value fp = 1 for the fraction of Sunlike stars that have planets.What would you suppose Drake chose for this parameter in 1960?
A) zero
B) 0.01
C) something between 0.2 and 0.5
D) 1
Correct Answer:
Verified
Correct Answer:
Verified
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