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.
A flying piece of cosmic rock or an alien threat? Comet 3I/ATLAS is hurtling through our solar system and captivating scientists and internet users alike, even prompting Kim Kardashian to ask NASA for answers.
Space Exploration
Nov 20, 2025
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A machine learning framework can distinguish molecules made by biological processes from those formed through non-biological processes and could be used to analyze samples returned by current and future planetary missions. ...
Astrobiology
Nov 18, 2025
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53
As humans began to explore outer space in the latter half of the 20th century, radio waves proved a powerful tool. Scientists could send out radio waves to communicate with satellites, rockets and other spacecraft, and use ...
Astronomy
Nov 4, 2025
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On October 29, Comet 3I/ATLAS reached its closest point to the sun.
Astronomy
Nov 3, 2025
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How could the principle of "radical mundanity" proposed by the Fermi paradox help explain why humans haven't found evidence of extraterrestrial technological civilizations (ETCs)? This is what a recent study posted to the ...
Astronomy
Oct 31, 2025
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Could scientists find life in the clouds of exoplanet atmospheres? This is what a manuscripton the arXiv preprint server hopes to address as a team of researchers investigate how the biosignatures of microbes could be identified ...
Astrobiology
Oct 28, 2025
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42
Are we alone? It's one of the most basic questions of human existence. People have been trying to answer it for millennia in one form or another, but only recently have we gained the tools and knowledge to start tractably ...
Astrobiology
Oct 24, 2025
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The Search For Extra Terrestrial Intelligence (SETI) is evolving. We've moved on from the limited thinking of monitoring radio waves to checking for interstellar pushing lasers or even budding Dyson swarms around stars. To ...
Astronomy
Oct 20, 2025
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109
Is anybody out there? Probably. Most stars have planets; we've discovered more than 6,000 exoplanets thus far, and the most basic statistics point toward the existence of countless potentially habitable worlds in the universe. ...
Astronomy
Oct 20, 2025
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87
EU researchers are developing powerful new telescopes to help uncover Earth-like planets around distant stars and advance the search for extraterrestrial life.
Planetary Sciences
Oct 3, 2025
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