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"It is statistically unlikely that humans are the only intelligent species in the universe. Nothing about the others will be known until contact is made beyond a radio signal from space that merely tells us they existed when it was sent. That contact may occur tomorrow, in a hundred years, or never. If it does it will be a high-risk scenario for humanity. It may be peaceful or hostile. Relying on alien altruism and benign intentions is wishful thinking. We need to begin identifying as a planetary species, and develop a global consensus on how to respond in either scenario"--

Space law. --- Life on other planets. --- Extraterrestrial beings. --- Human-alien encounters. --- Interstellar communication. --- Space warfare. --- War (International law) --- International law and human rights. --- Search for Extraterrestrial Intelligence (Study group : U.S.)

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Although we have done extensive studies of the Solar System and thus far found over 300 extrasolar planets – planets outside our Solar System – we have not yet found life, even primitive life, on any planet other than Earth. Might there be life on some of these newly discovered extrasolar planets? Not likely, as most are gas giants or are too close or too far from their sun. However, of late we are finding more and more Earthlike planets. It is now estimated that about 15 percent of the planets in the galaxy are Earthlike, and many of these will likely orbit their suns at the right distance to support life as we know it. No one knows yet if radio searches or other means of detection will reveal that we are not alone in the universe. But if we do discover intelligent life elsewhere, how will we communicate with it? Are there some “universal” methods of communication we can use? Is music or mathematics a universal language? Are there alien intelligences right here on Earth we can use to help us figure out ways of communicating? The answers may surprise you. All of these issues and more are covered in this exciting, readable, and authoritative book on a subject that is not mere idle speculation anymore. We are certainly getting closer to finding out who, if anybody, is out there. This book will not only inform you about the search and the likelihood of finding life, it will also actually teach you how to talk to aliens!

Extraterrestrial beings. --- Interstellar communication. --- Search for Extraterrestrial Intelligence (Study group : U.S.). --- Interstellar communication --- Extraterrestrial beings --- Astronomy & Astrophysics --- Astronomy - General --- Astronomical Observatories & Instruments --- Physical Sciences & Mathematics --- Life on other planets. --- Interplanetary communication --- Outer space communication --- Space communication --- Space telecommunication --- Extraterrestrial life --- Physics. --- Linguistics. --- Observations, Astronomical. --- Astronomy --- Popular works. --- Astronomy. --- Aerospace engineering. --- Astronautics. --- Astronomy, Observations and Techniques. --- Popular Science in Astronomy. --- Theoretical Linguistics. --- Popular Science, general. --- Aerospace Technology and Astronautics. --- Observations. --- Space sciences --- Aeronautics --- Astrodynamics --- Space flight --- Space vehicles --- Aeronautical engineering --- Astronautics --- Engineering --- Physical sciences --- Astronomical observations --- Observations, Astronomical --- Linguistic science --- Science of language --- Language and languages --- Natural philosophy --- Philosophy, Natural --- Dynamics --- Life on other planets --- Radio astronomy --- Telecommunication --- Planets --- Fermi's paradox --- Science (General). --- Astronomy—Observations. --- Search for Extraterrestrial Intelligence (Study group : U.S.) --- SETI --- S.E.T.I. --- Ames Research Center. --- Jet Propulsion Laboratory (U.S.).

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This book is a collection of essays written by the very scientists and engineers who have led, and continue to lead, the scientific quest known as SETI, the search for extraterrestrial intelligence. Divided into three parts, the first section, ‘The Spirit of SETI Past’, written by the surviving pioneers of this then emerging discipline, reviews the major projects undertaken during the first 50 years of SETI science and the results of that research. In the second section, ‘The Spirit of SETI Present’, the present-day science and technology is discussed in detail, providing the technical background to contemporary SETI instruments, experiments, and analytical techniques, including the processing of the received signals to extract potential alien communications. In the third and final section, ‘The Spirit of SETI Future’, the book looks ahead to the possible directions that SETI will take in the next 50 years, addressing such important topics as interstellar message construction, the risks and assumptions of interstellar communications, when we might make contact, what aliens might look like and what is likely to happen in the aftermath of such a contact.

Electronic books. -- local. --- Extraterrestrial anthropology -- Research -- History. --- Life on other planets. --- Interstellar communication --- Extraterrestrial beings --- Exobiology --- Astronomy & Astrophysics --- Physical Sciences & Mathematics --- Astronomy - General --- Astronomical Observatories & Instruments --- Extraterrestrial anthropology --- Research --- History. --- Extraterrestrial life --- Physics. --- Observations, Astronomical. --- Astronomy --- Astrobiology. --- Astronomy, Observations and Techniques. --- Signal, Image and Speech Processing. --- Observations. --- Planets --- Fermi's paradox --- Anthropology --- Interplanetary voyages --- Life on other planets --- Space sciences --- Astrobiology --- Biology --- Habitable planets --- Life --- Origin --- Astronomy—Observations. --- Signal processing. --- Image processing. --- Speech processing systems. --- Pictorial data processing --- Picture processing --- Processing, Image --- Imaging systems --- Optical data processing --- Astronomical observations --- Observations, Astronomical --- Processing, Signal --- Information measurement --- Signal theory (Telecommunication) --- Computational linguistics --- Electronic systems --- Information theory --- Modulation theory --- Oral communication --- Speech --- Telecommunication --- Singing voice synthesizers --- Search for Extraterrestrial Intelligence (Study group : U.S.) --- SETI --- S.E.T.I. --- Ames Research Center. --- Jet Propulsion Laboratory (U.S.).