On making radio contact with extraterrestrial civilizations

Details On making radio contact with extraterrestrial civilizations On making radio contact with extraterrestrial civilizations

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978ap%26ss..55....7b&link_type=abstract

Astrophysics and Space Science, vol. 55, no. 1, May 1978, p. 7-13.

Mathematics

Probability

2

Extraterrestrial Intelligence, Interstellar Communication, Milky Way Galaxy, Radio Beacons, Economic Factors, Extraterrestrial Life, Probability Theory, Project Management, Radio Astronomy, Radio Transmission, Signal Reception, Space Communication

Scientific paper

The problem of attempting to make radio contact with other technological civilizations is examined. It is argued that there are few (perhaps indeed no) omnidirectional radio beacons for a the Galaxy primarily because any such beacon, to be effective, would have to be designed for a call-response time of at least some 10,000 years which is much too long to be likely to be acceptable to governments. A consequence is that any search program by us would have little chance of detecting incoming signals.

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