SETI program made a simulation of how to handle the situation that radio telescopes captured techno-signals from an unknown destination or another civilization. The fact is that this kind of research and simulations are fascinating. But the problem or difference between those simulations and real situations is that nobody knows what alien communication looks like. There is a possibility that they communicate with X- or gamma-ray lasers, gravitational waves, or by using some kind of wormholes.
In this text, I will not write about numeric systems that are used to encode the messages. But aliens should encrypt their data so that the receiving systems can find the purpose messages from natural radio- or some other EM-senders like pulsars or black holes. Encryption causes situations where researchers cannot separate those messages that are sent on purpose from cosmic background.
The transmission power of those signals must be extremely high. It's possible to use natural radio sources, like neutron stars' jets as carrier waves. In that model, the data transmission will send to the jets of the neutron star. That increases transmission power.
When we think about radio messages there is a lot of communication in the Earth's atmosphere that is not meant for humans. Almost all communication that humans send to other planets from Earth is the command signals for different types of automatized machines like probes. That kind of communication includes the control and location signals of probes. And that kind of communication that happens between machines is hard to detect.
"The Breakthrough Listen Investigation for Periodic Spectral Signals (BLIPSS) is using pioneering techniques to search for extraterrestrial intelligence (SETI) within the Milky Way. The team developed software based on a Fast Folding Algorithm (FFA), a search method that offers enhanced sensitivity to periodic sequences of narrow pulses. This approach is aimed at detecting repeating patterns in signals emanating from our galaxy’s core. The algorithm has been tested on known pulsars and will be used to scan a large dataset of the Galactic Center. Credit: Breakthrough Listen / Danielle Futselaar" (ScitechDaily.com/Eavesdropping on E.T.: New Software for Hunting Technosignatures From Extraterrestrial Intelligence)
There is the possibility that interstellar robots are offering a route to detect alien civilizations. The alien civilizations might keep in contact with those probes. But it's also possible that those hypothetical probes send one-way data to their senders. And in that kinds of cases, it's hard to detect the probe, that can use maser communication. The extremely thin maser ray is hard to detect from the sides.
Interstellar robots can offer an indirect way to detect alien civilizations. In that version, researchers detect those probes straight or they could find their communication signals. But again, how to separate those signals from the cosmic background?
Another thing that makes it hard to analyze things like WoW! and BLC1 signals is that nobody knows when those signals began. Another thing is that the source of those signals is open. Maybe they were natural, but why they were unique? Were they the signals from some probe? If our solar system is between the probe and its sender's solar system and the probe sends the data, that case looks like BLC-1 or WoW! signal.
Some astronomers say that we should look for alien probes than have straight contact with alien civilizations. The reason for that is intelligent civilizations could make a fleet of robots that send information to it. And the probe must have some kind of builder. The probes would search the habitable planetary systems for colonization. But in that case, we should think about the alien point of view about that thing. The aliens might come from a different planet.
That means their chemical and physiological environment might be different than on Earth. That means they might have more oxygen in their atmosphere or their planet might have stable temperatures. And at least micro-organisms are making the invasion of Earth quite difficult. Thousands of variables can make other planets hostile to intruders of colonists.
https://interestingengineering.com/science/seti-earth-to-receive-simulated-alien-transmission
https://interestingengineering.com/science/should-seti-give-up-on-aliens-and-look-for-cosmic-robots-instead
https://scitechdaily.com/eavesdropping-on-e-t-new-software-for-hunting-technosignatures-from-extraterrestrial-intelligence/
Comments
Post a Comment