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Extraterrestrial intelligence: an observational approach.

B Murray, S Gulkis, R E Edelson

    Science (New York, N.Y.)
    |February 3, 1978
    PubMed
    Summary
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    New technology enables broad exploration of the microwave spectrum for extraterrestrial intelligence (ETI) signals. Even negative results from a 5-year survey will significantly constrain the search space for interstellar communication.

    Area of Science:

    • Astrobiology and Radio Astronomy
    • Search for Extraterrestrial Intelligence (SETI)

    Background:

    • The microwave region of the electromagnetic spectrum is a key target for detecting potential extraterrestrial intelligence (ETI) signals.
    • Current exploration of this frequency range remains limited, despite its plausibility for interstellar communication.

    Purpose of the Study:

    • To outline a strategy for an all-sky, broad-band survey of the microwave spectrum.
    • To leverage advancements in data processing and low-noise reception for enhanced signal detection.
    • To establish significant boundaries for ETI signal detection, even with null results.

    Main Methods:

    • Utilizing existing antenna technology for broad frequency and spatial coverage.
    • Implementing advanced data processing and low-noise reception techniques.

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  • Structuring a comprehensive, 5-year all-sky survey.

    • Main Results:

    • The proposed survey methodology is feasible with current technology.
    • Negative results would provide valuable constraints on the parameters for ETI signal detection.
    • Developed technologies and acquired data will benefit radio astronomy and deep-space communications.

    Conclusions:

    • A systematic, broad-band survey of the microwave spectrum is achievable and scientifically valuable.
    • This approach can significantly advance the search for extraterrestrial intelligence (SETI).
    • The project offers dual benefits for radio astronomy and space communication technologies.