100 years of SETI: what has been learned?

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• Professor Ben Zuckerman, Professor Emeritus, UCLA
• Monday 13 October 2025, 12:00-13:00
• Martin Ryle Meeting Room, Kavli Institute.

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Strong empirical evidence demonstrates that a communicative technological extraterrestrial is unlikely to exist now within _{500 light-years of Earth or to have passed within} 100 light-years of Earth during the past few billion years. The evidence is based on numerous sky surveys at various electromagnetic wavelengths that date back ~100 years, and on the absence of an alien probe in Earth orbit.

This talk is part of the Institute of Astronomy Extra Talks series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Extra Talks
• Institute of Astronomy Talk Lists
• Martin Ryle Meeting Room, Kavli Institute

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