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JSmith1 JSmith1
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5 months ago

When considering the possible number of technologically advanced civilizations in our galaxy, which of the following factors is it useful to consider?



the average lifespan of an alien



the average lifespan of the civilization



the distance to the civilization's planet



the type of advanced communication they use

Textbook 
ASTRO

ASTRO


Edition: 3rd
Authors:
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durandaldurandal
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5 months ago
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JSmith1 Author
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5 months ago
Helped a lot
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Yesterday
This helped my grade so much Perfect
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2 hours ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
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