CETI: Foundations, Milestones, and the Cautious Path to Contact with Extraterrestrial Intelligence
To the point
ETI communication is the proactive effort to detect and possibly message alien civilizations using universal ideas like mathematics and physics, drawing on milestones such as the Arecibo message by Frank Drake and Carl Sagan and Cocconi and Morrison, while facing vast delays and noise and requiring careful international ethical coordination.
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