The signals aliens might be too complicated for us
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"each of these stars can be new York, Paris, London, and we even about it do not suspect," says Nate Tellis, University of California, Berkeley, commenting on the analysis 5600 stars, conducted by the Keck Observatory in Hawaii, where one of the most powerful telescopes in the world, last spring. Tellis, in search of laser beams, powerful flashes beams of photons which live some nanoseconds, asks the important question: can these data be something special, some kind of signal intelligent civilization sent to Earth?
Astronomers analyzing the data, the Keck Observatory and the Kepler mission and find more and more earth-like planets rotating other stars. However, growing and the chances that one of these planets, you might find something interesting.
Imagine another life form in a distant world, which similarly seeks the laser light, says Tellis. "If we pointed the telescope at the Earth from a great distance, we would not have seen what people are doing. Because the Earth does not send laser beams into the Universe, signaling its existence. Why would other worlds to do this?".
The Astronomers at the Keck Observatory hours looking at the night sky in search of exoplanets and collect massive amounts of data about potential new worlds in the milky Way. Tellis along with astronomer Geoff Marcy dived into the data files of the Cake with 67 000 spectra investigated from 2004 to 2016. They are armed with a computer algorithm that detects lasers, which cleared all the data about the records starry lights, made a 10-foot Cake, and a spectroscope with a high resolution. The laser emission lines, born from the unnatural sources, can be distinguished from natural astrophysical sources in their monochrome. The algorithm identified 5000 of interest, requiring further study. Then Tellis and Marcy analyzed them manually, deleting all but 12 signals.
Tellis and Marcy were able to exclude the characteristics of the laser signals from all the studied spectra. "We have not found conclusive evidence of extraterrestrial laser radiation among 5600 all-star level power from 3 kW to 13 MW." These results will help to narrow the possible range of distribution of intelligent civilizations.
Based on the speed with which astronomers have discovered earth-like planets orbiting stars, Tellis and Marcy counted the number of earth-type planets, which they need to explore. "Because these star systems contain approximately 2,000 earth-like planets, we exclude models of the milky Way, in which more than 0.1% warm earth-like planets contain technological civilization, which, intentionally or not, sending laser beams".
In Short, if technological civilization appear only 1% of these earth-like planets, study Tellis and Marcy had to identify about 20 civilizations.
There is also the possibility that technological civilizations exist, but for many millions of years development, we have technology that is beyond our reach, or do not want to contact with primitive civilizations like ours.
"I Think when you are engaged in the search for extraterrestrial life, it is important not to get upset because of the lack of results," says Tellis. "They have been searching for 60 years, and results no and no and no."
"If you propose to conduct a study on SETI at the Keck Observatory over a thousand hours, nobody will give you," says astronomer Jason Wright. Meanwhile, there is a huge variety of sets of astronomical data waiting to see them a second time. One man's trash — another man's treasure, even if we are talking about the search for life in the Universe."
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