Project Ozma II - Astronomers renew the search for CETI signals from space

Details Project Ozma II - Astronomers renew the search for CETI signals from space Project Ozma II - Astronomers renew the search for CETI signals from space

Dec 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975spfl...17..421s&link_type=abstract

Spaceflight, vol. 17, Dec. 1975, p. 421-423.

Physics

Extraterrestrial Life, Interstellar Communication, Life Detectors, Radio Telescopes, Signal Detection, Main Sequence Stars, Project Management, Radio Signals

Scientific paper

A 300 ft diam. parabolic dish has been used at Green Bank to monitor possible extraterrestrial intelligent communication in the OZMA-II project, which can collect as much data in one min. as the Ozma-II 85 ft radio telescope could have collected in 19 years. Only main-sequence stars are worth monitoring, and of these only stars cooler than type F5 (so that their hydrogen is not burned off too rapidly) or warmer than K5 (so that their ecospheres will not be too small or tidal instabilities of planets too great) need be considered. Reasons for remaining with the 21 cm wavelength of interstellar hydrogen, rather than working with the 1.35 wavelength of water, are outlined. The Cyclops project involving thousands of separate 100 meter diam. parabolic dishes clustered within a 16 km area and pointed at a single target is described.

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