The recent detection of a strong radio signal from the sun-like star HD 164595 has sparked speculation about extraterrestrial intelligence, as discussed by researchers including Claudio Maccone and Douglas Vakoch. The signal's frequency of 11 GHz raises concerns about its potential man-made origins, as it aligns closely with known military and satellite communication bands. Experts emphasize that without further evidence, the signal cannot be definitively attributed to an alien civilization, and its detection may simply be a result of terrestrial interference or natural phenomena.
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Broadcasted radio signals emitted from Earth would indeed become lost among cosmic general background radio noise very quickly.Chuck Keranen said:The signals we've emitted...
How much degradation would occur as the signal ripples in all directions away from us...wouldn't the amount reaching a single destination be miniscule?
Agreed. Sending us a focused beam might only make sense if "They" thought we could make sense of it, or they are here already communicating, which would probably require more than one signal...not likely.rootone said:Broadcasted radio signals emitted from Earth would indeed become lost among cosmic general background radio noise very quickly.
I doubt that using our best technology presently available we could even detect a radio broadcast occurring on a hypothetical planet orbiting the Alpha Centuri system, our nearest stellar neighborhood.
An intentionally focused transmission would work a lot better if someone decided to do that.