Galactic extraterrestrial intelligence. I - The constraint on search strategies imposed by the possibility of interstellar travel

Details Galactic extraterrestrial intelligence. I - The constraint on search strategies imposed by the possibility of interstellar travel Galactic extraterrestrial intelligence. I - The constraint on search strategies imposed by the possibility of interstellar travel

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jbis...35...99s&link_type=abstract

British Interplanetary Society, Journal (Interstellar Studies), vol. 35, Mar. 1982, p. 99-115. NSF-supported research.

Mathematics

Logic

Extraterrestrial Intelligence, Interstellar Communication, Interstellar Travel, Milky Way Galaxy, Galactic Evolution, Hypotheses, Searching, Sociology, Solar System, Star Distribution, Time Dependence

Scientific paper

The possibility that extraterrestrial intelligence might settle the Galaxy by interstellar travel is investigated. The existence of this possibility is shown to be incompatible with the existence of a large number of potential sources of communication from extraterrestrial intelligences in the Galaxy. A detailed examination of suggested resolutions of this contradiction is presented. These include physical, temporal and sociological explanations. The sociological explanations include the so-called disinterest, self-destruction, fizzle, ZPG, taboo, and private zoo hypotheses. Each of these is carefully shown to require incredible universal ad hoc assumptions about the nature of extraterrestrial intelligence. It is concluded that proposed serial search modes for communication from extraterrestrial intelligence have negligible chance of success. A mathematical formalism for evaluating other search modes is also developed.

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