Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980asaer..18...32f&link_type=abstract
Astronautics and Aeronautics, vol. 18, Jan. 1980, p. 32-37.
Astronomy and Astrophysics
Astronomy
Extrasolar Planets, Extraterrestrial Life, Project Seti, Radio Telescopes, Extraterrestrial Environments, Planetary Systems, Radio Astronomy, Spaceborne Telescopes
Scientific paper
The existence and detection of extraterrestrial life are discussed. The evolution of life on earth is not considered possible if earth were 5% closer (runaway greenhouse effect) or 1% farther (runaway glaciation) from the sun, or if the sun were slightly more or less massive or hot. The Space Telescope and a possible interferometer search at infrared wavelengths, which offers a 100,000 times advantage over the visible in the ratio of planetary to stellar power, are proposed to help detect planetary systems about stars such as Barnard's star. The proposed NASA-Ames Project Cyclops, consisting of a 10 km phased array of 1026 dishes (perhaps on the back side of the moon), as well as a Soviet proposal to assemble 2 similar telescopes at the orbit of Saturn, would search in the radio frequency range for planets 100 light years or more distant.
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