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Home Q & A Board Science-Related Homework Help Physics Astronomy
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adreamer adreamer
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6 years ago
If the communication lifetime of civilizations in our galaxy is 10,000 years and our galaxy is 13 billion years old, what is the chance of us detecting another intelligent civilization now?
A) 1 in 13,000
B) 1 in 1,300,000
C) 1 in 1300
D) 1 in 130,000
Textbook 
Life in the Universe

Life in the Universe


Edition: 4th
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19Clyde19Clyde
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6 years ago
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adreamer Author
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6 years ago
Thanks
Brownr40
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Yesterday
Smart ... Thanks!
Loruiz15
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2 hours ago
Helped a lot
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