The search for extraterrestrial intelligence

Details The search for extraterrestrial intelligence The search for extraterrestrial intelligence

May 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975sciam.232...80s&link_type=abstract

Scientific American, vol. 232, May 1975, p. 80-89.

Astronomy and Astrophysics

Astronomy

7

Extraterrestrial Communication, Extraterrestrial Life, Interstellar Communication, Extraterrestrial Radio Waves, Intelligence, Radio Astronomy, Radio Reception, Radio Spectra, Radio Telescopes, Signal Detection

Scientific paper

Suggested means of detecting extraterrestrial civilizations are examined. Such suggestions include the construction of a $10 billion, 25-square-mile radio receiver consisting of 1500 component antennas each 100 meters in diameter. Up to the present, 200 stars have been investigated for evidence of intelligent life; the author concedes that at least 200,000 stars would have to be probed to give us even a reasonable chance of detection, but contends that it would be worth our while to do so.

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