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Old 05-18-2014, 06:06 PM   #58
Anthony
 
Join Date: Feb 2005
Location: Berkeley, CA
Default Re: [Space] Panspermia and the Campgaign

Quote:
Originally Posted by whswhs View Post
It will have to be really close observation, though. Suppose you observed Earth, say, a quarter millennium ago. What signs of intelligence could you spot from a modest interplanetary distance, let along from parsecs away?
Using what level of technology? The most visible stuff is probably agriculture and mining activity, either of which could be detected at several AU by the equivalent of a high end TL 8 telescope.
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