Astronomers develop revolutionary new method of detecting intelligent alien life
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Astronomers develop revolutionary new method of detecting intelligent alien life
... which seems head-slappingly obvious once explained:
http://links.mkt746.com/servlet/MailView?ms=MTc1NjM1OTkS1&r=NjA3MzQ1MDcxNTgS1&j=MjE2NTY0MzIxS0&mt=1&rt=0
(Hope the link works for everyone; it's actually an html version of a newsletter I get.)
Rather than looking for radio waves, the team suggests searching for the heat signatures of nearby planets, which requires a giant telescope that could detect infrared radiation directly from an exoplanet, thus revealing the presence of a civilization. "The energy footprint of life and civilization appears as infrared heat radiation," says Kuhn, the project's lead scientist. "A convenient way to describe the strength of this signal is in terms of total stellar power that is incident on the host planet." The technique arises from the fact that a civilization produces power that adds to the heat on a planet, beyond the heat received from its host star. A large enough telescope, idealized for infrared detection, could survey planets orbiting stars within 60 light-years of the Sun to see whether or not they host civilizations.
http://links.mkt746.com/servlet/MailView?ms=MTc1NjM1OTkS1&r=NjA3MzQ1MDcxNTgS1&j=MjE2NTY0MzIxS0&mt=1&rt=0
(Hope the link works for everyone; it's actually an html version of a newsletter I get.)
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