The Search for Extraterrestrial Intelligence, SETIPhilip Morrison, John Billingham, John Wolfe National Aeronautics and Space Administration, Scientific and Technical Information Office, 1977 - 276 páginas |
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The Search for Extraterrestrial Intelligence, SETI Philip Morrison,John Billingham,John Wolfe Vista completa - 1977 |
The Search for Extraterrestrial Intelligence, SETI Philip Morrison,John Billingham,John Wolfe Vista completa - 1977 |
The Search for Extraterrestrial Intelligence, SETI Philip Morrison,John Billingham,John Wolfe Vista completa - 1977 |
Términos y frases comunes
Ames Research Center antenna Arecibo array astrometric bandwidth beam biological capabilities CETI clouds collecting area COMPLEMENTARY DOCUMENT cosmic cost cultural Cyclops density detection direction distance Earth Earth-based EIRP electromagnetic emission energy evolution extraterrestrial civilizations extraterrestrial intelligence factors flux level frequency band galactic Galaxy ground-based hydrogen INTERSTELLAR COMMUNICATION interstellar medium interstellar search Jesse Greenstein Jet Propulsion Laboratory main sequence maser microwave window NASA noise observations Observatory optimum orbit Philip Morrison planetary systems planets polarization possible present problem Project Cyclops pulsars pulse radar radial velocity radiation radio astronomy radio frequency interference radio telescopes range received resolution satellite Science Workshop scientific search for extraterrestrial search for signals search strategy search system Section sensitivity SETI system signals from extraterrestrial solar system sources space spectral type spectrum star formation stellar studies techniques temperature terrestrial transmitters University W/m² water hole wavelength
Pasajes populares
Página 19 - It is both timely and feasible to begin a serious search for extraterrestrial intelligence. 2. A significant SETI program with substantial potential secondary benefits can be undertaken with only modest resources. 3. Large systems of great capability can be built if needed. 4. SETI is intrinsically an international endeavor in which the United States can take a lead.
Página 8 - Other imaginative and enthusiastic speculators foresee big technological gains, hints and leads of extraordinary value. They imagine too all sorts of scientific results, ranging from a valid picture of the past and the future of the Universe through theories of the fundamental particles to whole new biologies. Some conjecture that we might hear from nearimmortals the views of distant and venerable thinkers on the deepest values of conscious beings and their societies. Perhaps we will forever become...
Página 33 - CONCLUSIONS 1. IT IS BOTH TIMELY AND FEASIBLE TO BEGIN A SERIOUS SEARCH FOR EXTRATERRESTRIAL INTELLIGENCE 2. A SIGNIFICANT SETI PROGRAM WITH SUBSTANTIAL POTENTIAL SECONDARY BENEFITS CAN BE UNDERTAKEN WITH ONLY MODEST RESOURCES 3. LARGE SYSTEMS OF GREAT CAPABILITY CAN BE BUILT IF NEEDED 4. SETI IS INTRINSICALLY AN INTERNATIONAL ENDEAVOR IN WHICH THE UNITED STATES CAN TAKE A LEAD...
Página 6 - We do not intend to send any signals out to add to those which have already gone out from our TV transmitters and our powerful radars. Rather, we want to listen, to search all the directions of space, the many channels of the radio (and other) domains, to seek possible signals. Perhaps it will be only an accidental signal, as we have made ourselves. That would be harder to find. Or perhaps there is a deliberate signal, a beacon for identification, or even a network of communication. There seems no...
Página 21 - W/m2. But in these, as apparently in all radio astronomy sky surveys, any coherent signals that might have been present were rejected as "interference.
Página 196 - A space-based ISS ; and an ISS sited on the far side of the Moon. Both of these are possible in the future, but we do not know at what cost. Furthermore, a space-based ISS, unless shielded at additional expense, remains vulnerable to interference from satellite and ground-based transmitters; while an ISS on the far side of the Moon is vulnerable to all transmissions originating beyond the lunar orbit. Thus, there exists a need for RFI protection. We strongly recommend : a. That the US undertake immediate...
Página 20 - O - 78 - 3 1971 the growth of large-scale integrated circuit technology has been spectacular. It now appears possible to build, at reasonable cost, solid state fast Fourier analyzers capable of resolving the instantaneous bandwidth into at least a million channels on a real time basis.
Página 35 - ... long range goals compatible with SETI. Since NASA clearly meets these criteria it is particularly appropriate for NASA to take the lead in the early activities of a SETI program. SETI is an exploration of the Cosmos, clearly within the intent of legislation that established NASA in 1958. SETI overlaps and is synergistic with long term NASA programs in space astronomy, exobiology, deep space communications and planetary science. NASA is qualified technically, administratively, and practically...
Página 33 - The USSR is capable of substantial space technology should that prove important in the future. Finally, joint leadership of an international SETI program by the US and the Soviet Union might constitute a logical continuation of the cooperative endeavors in space initiated by the Keldysh-Low agreements most recently responsible for the Apollo-Soyuz Test Program. West European nations, especially West Germany, Holland, and England, have also evidenced increasing interest in new radio astronomical endeavors....
Página 21 - For these reasons it is premature to adopt only one strategy to the exclusion of others. To cover a wide range of other possibilities it is recommended that in addition to a high sensitivity search of nearby stars, there also be a complete search of the sky to as low a flux level and over as wide a frequency band as practicable. (See Sections...