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The Seek For Extraterrestrial Intelligence: SETI

The Seek For Extraterrestrial Intelligence: SETI

SETI stands for the Search for Extra-Terrestrial Intelligence. Kindly note that the word 'radio' seems nowhere in that phrase, but searching for artificial radio transmissions from extraterrestrial civilizations appears to be near synonymous with SETI, as reinforced by way of the popular movie "Contact" (primarily based on Carl Kruse blog - please click the following webpage - Sagan's novel). Now there may be nothing fallacious with radio SETI. The search for radio waves has been well thought out and would appear to supply up the maximum chance for success. However, there are more methods to skin the SETI cat (as it were), and after forty nine years of searching primarily via radio, I suggest that some more methods be adopted and explored. Any a part of the electromagnetic (EM) spectrum is suitable and up for investigation, reminiscent of optical SETI (on the lookout for laser beams) or infrared SETI (searching for Dyson Spheres) or just looking for alien artifacts (as in the novel/film "2001: A Area Odyssey"). From that, we note that one can method the examine of UFOs and/or historical astronauts as representing a type of SETI. Whatever investigation tells you that extraterrestrial intelligence (ETI) exists, or as soon as existed, or does not exist in any respect (and a negative result's as vital as a constructive one) is SETI.

Why do SETI at all? That's an apparent first question. Luckily, there are many good solutions to that question. There's pure scientific curiosity for starters - exploring just for the sake of exploring. Then there's the more philosophical approach in that SETI helps to raised decide our place in the cosmos. A negative reply is just as necessary as a optimistic reply in figuring out whether humanity is exclusive, top of the heap, one of many nice unwashed cosmic crowd, or the new boy on the block. SETI has a sensible side too in figuring out the existence of potential neighbors which could be sources of profit and/or threats to us. Obviously, a choose few scientists, SETI fanatics, have lengthy felt that SETI was, and is, worth doing. Radio SETI is (as of this writing), a fairly mature science now 49 years old.

Now if seven is a lucky number, then seven instances seven needs to be even luckier, but, some 49 years after the primary radio SETI experiment (Project Ozma) was conducted by Dr. Frank D. Drake, there's be no luck in detecting any sign of every other technological extraterrestrial civilization (49 years as I write this - it's even longer now). What does this counsel to us as a life form with an evolved technological civilization? Where are our 'kin' out there among the stars?

Firstly, it means that radio SETI isn't going to be fairly as straightforward as first envisioned. The number-crunching back in these early days instructed that ETI with a suitable detectable expertise (radio emissions or relatively transmissions) could be pretty common. Though only a relative few of these haystack stalks have been sifted for that needle, it is becoming clearer that type of SETI isn't going to be easy; N (the number of technologically radio communicating ETI in the cosmos) isn't going to be an extremely large number. So, some constraints on the SETI concept and logic have come home to roost.

By way of the search to date, it is clear (to me anyway) that there are not any Type III civilizations (able to harness the energy output of a complete galaxy) in any galaxy even remotely 'shut' (in cosmic terms) to us. If there have been any Type 2 civilizations (potential to command the energy output of a complete star) almost in our personal galaxy it ought to have proved pretty apparent by now. There have been after all many false alarms, but in addition a number of cases that seemed like a positive signal was received. Alas, all have been one-offs and have by no means been picked up again. Without verification, those 'wow' signals stay enigmas, but not proof constructive of extraterrestrial intelligence (ETI).