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Intelligent Responses to Our Technological Signals Will Not Arrive In Fewer Than Three Millennia

Space Sciences

Intelligent Responses to Our Technological Signals Will Not Arrive In Fewer Than Three Millennia

A. Siraj and A. Loeb

What are the odds of initiating a conversation with another civilization? Research by Amir Siraj and Abraham Loeb delves into the intriguing notion of extraterrestrial contact, revealing that responses to our technological signals may arrive only after millennia.... show more
Abstract
What is the chance we start a conversation with another civilization like our own? Our technological society produced signals that could be received by other extraterrestrial civilizations, within a sphere around us with a radius of ~10^2 light years. Given that, the Copernican principle provides a lower limit on the response time that we should expect from transmitters on Earth-like planets around Sun-like stars. If our civilization lives longer, the expected number of responses could increase. We explore the chance of detecting a response in the future, and show that a response should only be expected to arrive after a few millennia.
Publisher
arXiv
Published On
Aug 17, 2021
Authors
Amir Siraj, Abraham Loeb
DOI
https://doi.org/10.1016/j.actaastro.2021.08.053
Tags
extraterrestrial civilizations
Copernican principle
communication
response time
astrobiology
technology
human civilization

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