Physical sciences: Difficulty of interstellar radio communication

Details Physical sciences: Difficulty of interstellar radio communication Physical sciences: Difficulty of interstellar radio communication

Mar 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974natur.248..317b&link_type=abstract

Nature, Volume 248, Issue 5446, pp. 317-318 (1974).

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IN 1959 Cocconi and Morrison1 suggested that the hyper-fine transition of atomic hydrogen at 1,420.405 MHz is the uniquely rational choice of frequency to use in attempts at interstellar communication. Since then other rational choices have been put forward: for example, the first or second overtones of this frequency2,3 or the frequency of one of the hydroxyl transitions at 1,612, 1,665, 1,667 and 1,720 MHz3,4. Very recently Drake and Sagan5 have argued ingeniously in favour of yet two further frequencies. Unfortunately, none of the rational choices may now be treated with confidence as the correct one. This magnifies the difficulty of the problem.

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