We’ve only been listening to the universe a couple of decades. And we’ve only been paying attention to the radio wave WE use, not the entire carrier spectrum. So any radio signals that got to us before we were listening, we missed em. Any radio signal that haven’t gotten here yet, well we haven’t had the chance to miss them yet. And anything in the parts of the carrier spectrum we don’t use, zipped right by.
The problem always is that space is HUGE. No really, much bigger than your thinking. If you’ve got a seats 4 to 6 round dining room table, or at least have sat at one, imagine a map of the Milkyway on it. Down about 6 inches one edge, in an unpopular arm of the galaxy, put a little spec of something. That’s earth. And stand look at that for a second. We’re really small, entire planet covered by pepper flake. Now on top of that put a dime. That dime covers the entire distance we, humans, could be detected from a far. That’s about 150 light years of distance. 150 years ago is when we started playing around with radios, and we’re pretending for this that our early radio stuff was strong enough to get out of the atmosphere at detectable, it wasn’t, but we’re as friendly as possible. Also around that time is when we started artificially lighting cities, which potentially be detected by really good telescopes.
That’s it. That dime, on that table, in that room, in that house, in that city. That is the entirety of the universe that could detect us. And that’s about what we’re able to seriously detect too. Our telescopes can’t detect artificial lighting even that far out.
So there could be many many peeps. But we just don’t have the tech to detect them.
This is interesting...
Bioinformation and Neutrino Communication:
Communications among civilizations may include self-descriptive bioinformation because pathogen dynamics exist in their astrobiology and astrovirology, which could become pathogenic upon actual contact. This information is of mutual benefit, if reciprocated. However, in contrast, the strategic counter-scenario of self-hidden civilizations is also discussed. Civilizations, including extra-terrestrial civilizations have been divided and stratified into three levels, using a wide non-linear logarithmic scale. The levels are based on their energy expenditures: level 1 is at 4x10^19 erg/sec; level 2 is at 4x10^33 erg/sec; and level 3 is at 4x10^44 erg/sec. Terrestrial civilization is currently below the entry level I. Particularly advanced civilizations, which are above the highest level, may engineer interstellar travel and could move their planets across interstellar distances. Communication among civilizations has always been of keen interest. In terms of ability to communicate among advanced civilizations, neutrinos may be used for galactic and inter-galactic communication, in addition to or instead of using electromagnetic radiation. Thus, at this juncture, deliberation and debate are essential to proceed with development of civilization and communication.
https://pmc.ncbi.nlm.nih.gov/articles/PMC10165035/