Can We Detect Extraterrestrial Radio Signals Amid Solar Interference?

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Discussion Overview

The discussion revolves around the possibility of detecting extraterrestrial radio signals in the presence of solar interference. Participants explore theoretical implications, technological capabilities, and the nature of potential extraterrestrial civilizations, considering both the challenges and possibilities of communication across vast distances in space.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants question whether it is feasible to distinguish extraterrestrial signals from the electromagnetic radiation emitted by their respective suns, suggesting that solar interference could overpower any signals sent by civilizations.
  • Others propose that an advanced civilization might develop unique and powerful signals capable of penetrating stellar noise, although there is uncertainty about the methods they would use for communication.
  • One participant references the Arecibo message as an example of a signal humanity could create that might be detectable over thousands of light years.
  • Another participant expresses skepticism about the ability to decipher intelligent signals from background noise, emphasizing the difficulty of identifying the correct signal type and frequency.
  • A philosophical perspective is introduced regarding the nature of intelligence and the likelihood of encountering civilizations at various stages of technological advancement, suggesting that if intelligent life exists, they may be significantly more advanced than humanity.
  • There is speculation about the potential for a civilization to utilize a massive planet-wide antenna array to enhance signal transmission, although this remains a hypothetical scenario.

Areas of Agreement / Disagreement

Participants do not reach a consensus; multiple competing views remain regarding the feasibility of detecting extraterrestrial signals amid solar interference and the nature of advanced civilizations.

Contextual Notes

Limitations include assumptions about the technological capabilities of extraterrestrial civilizations, the nature of solar interference, and the definitions of intelligence and communication methods.

kahoon
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I mean, several light years from here, is it possible to distinguish between the signals coming from Earth and the massive amount of electromagnetic radiation emitted by our Sun? From a great distance, every solar system must appear dot-like.

Is it possible that civilizations are actually trying to communicate but are unable to do so because their signals are overpowered by their respective suns'?
 
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I think a civilization advanced enough could create a unique, powerful signal to get through the stellar noise. But I'm no expert...

I'm not sure the 'beacon' approach to signaling is what an advance civilization would do. They'd probably have directed signals at systems and/or planets with probable life.
 


I'm pretty sure we (humanity) could create a signal that we (humanity) could detect at a distance of some thousands of light years. See, for example, the arecibo message.
 


I'm less optimistic, nabeshin. Ciphering an intelligient [even terrawatt] signal from background noise in the universe is hugely difficult after a a few tens of light years - and that assumes you know the signal type and frequency for which to search. I'm a big fan of SETI and an optimist, but, it is not an easy task, IMO.
 


Hmm a filosofical point of view about SETI.
We would call intelligent a creature that cares, comprehends and tries to reach out for the outer space (without built in curiosity one can never grow intelligent)
now reagrding that if we will ever meet any form of life it is very slim chance they will be exactly at the same development stage like us. more likely it will be somewhere between bilion year ahead of us or billion year behind us.
since billion year behind us is called unintelligent, so

if we will ever find any intelligent creature it will be inbetween like us to billion year ahead of us.

now it is widly believed that humans advance exponencially, so after even few hundred years the technological progress is beyond imagination (harnessing, directing gravity for e.g.)

now statistically if there is an intelligent life they most likely are WAY WAY WAY ahead of us and thus the means of communication are also ahead of us,
they can borth receive week signals, and transmit superpowerfull signals
they should be detectable easily
the absence of this means - they don't want to be detected or they don't exist. both are frightening.

sorry for being filosofical
 


Likely or not, I think we can all agree that it's possible. What if the signal sent used a massive antenna array planet-wide, with our full energy production? WE might not do that, but perhaps a doomed, or moving civilization might?
 

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