The search for extraterrestrial intelligence (SETI) is a multidisciplinary research area focused on detecting evidence of technologically advanced civilizations beyond Earth, primarily through their electromagnetic emissions or technosignatures. It integrates radio astronomy, signal processing, astrophysics, planetary science, and increasingly machine learning to monitor and analyze vast bandwidths of the sky for narrowband, pulsed, or otherwise non-natural signals. Research addresses detection algorithms, interference mitigation, instrument calibration, and statistical frameworks for evaluating candidate signals. Modern SETI also explores non-radio channels, including optical or infrared beacons and other engineered signatures, and develops quantitative strategies for survey design, target selection, and constraints on the prevalence of technological life.
Scientists are revolutionizing the search for extraterrestrial life by challenging our somewhat Earth-centric assumptions about where and how life might exist in the universe. A new review argues that we must embrace the ...
Astrobiology
Jun 18, 2025
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It was a simple question asked over lunch in 1950. Enrico Fermi, the Nobel Prize-winning physicist who helped usher in the atomic age, was dining with colleagues at Los Alamos, New Mexico, when the conversation turned to ...
Astronomy
Jun 11, 2025
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How can radio astronomers successfully identify extraterrestrial radio signals while discerning them from Earth-based radio signals? This is what a recent study published in The Astronomical Journal hopes to address as a ...
Astronomy
Jun 11, 2025
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"Are we alone?" This ancient question has occupied humanity's mind for a long time. In 1995, the discovery of the first exoplanet orbiting a sun-like star opened the door to exploring this profound mystery.
Astrobiology
Jun 3, 2025
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The search for extraterrestrial life has long gone back and forth between scientific curiosity, public fascination and outright skepticism. Recently, scientists claimed the "strongest evidence" of life on a distant exoplanet—a ...
Astrobiology
May 28, 2025
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When astronomers announced last month they might have discovered the most promising hints of alien life yet on a distant planet, the rare good news raised hopes humanity could soon learn we are not alone in the universe.
Astronomy
May 24, 2025
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In April, scientists captured global attention by announcing they'd found a molecule in a faraway planet's atmosphere that could signal life there.
Astrobiology
May 23, 2025
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More than 60 years ago, the Search for Extraterrestrial Intelligence (SETI) officially began with Project Ozma at the Greenbank Observatory in West Bank, Virginia. Led by famed astronomer Frank Drake (who coined the Drake ...
Astronomy
May 16, 2025
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The detection of life beyond Earth would be one of the most profound discoveries in the history of science. The Milky Way galaxy alone hosts hundreds of millions of potentially habitable planets. Astronomers are using powerful ...
Astrobiology
Apr 28, 2025
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Whether or not we're alone in the universe is one of the biggest questions in science.
Astrobiology
Apr 23, 2025
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