The universe is so big that we can’t imagine it, and the earth on which humans live is just one of the countless terrestrial planets in the vast universe. Although the earth is very small in front of the universe, from another perspective, it is very great. Because the earth is the only life planet we have discovered so far, and intelligent life human beings were born.
At the moment when human beings walked out of the earth, a question we had to face arises, that is, does alien civilization exist? Before human beings walked out of the earth, before they truly saw the vastness and mystery of the universe, many people would be skeptical about the existence of alien civilizations.
But when we really see the vast universe and have more and more knowledge about the universe, most people no longer doubt the existence of extraterrestrial civilization. From a scientific point of view, it is the most ridiculous thing that the universe does not have an extraterrestrial civilization, and the existence of mankind itself shows that there are other intelligent life in the universe.
Of course, if we want all human beings to recognize the existence of alien civilizations, we still have to truly find evidence of the existence of alien civilizations. Soon after humans left the earth, they started the extraterrestrial civilization search program. Scientists mainly adopted two methods to search for extraterrestrial civilization. One method is to search for luck through deep space probes, such as Voyager 1 and Voyager 2. They all carry a compact disc that records information about the earth and mankind.
The Voyager spacecraft is constantly advancing outside the solar system. If luck is good enough, it may be captured by alien civilizations after leaving the solar system in the future, so that the existence of the earth and humans can be known through the above optical disk. According to the coordinates of the earth recorded in the CD, alien civilizations can come to the solar system as long as they have the ability to navigate between stars. At that time, we will know that alien civilizations are real.
Of course, searching for alien civilizations through probes is a bad idea. The success rate of this method is very low. The reason is that the gravitational range of the sun reaches 4 light-years, and the speed of the probe is very slow. At this speed, It may take at least tens of thousands of years to fly out of the solar system. Only by going out of the solar system can the probe possibly encounter alien civilizations.
Therefore, the main hope for scientists to find alien civilizations is still in the second way, which is to search for signals of alien civilizations that may exist in the universe. If there are many scientific and technological civilizations stronger than humans in the universe, then these civilizations cannot be separated from the use and spread of radio communications. The stronger the interstellar civilization, the more they need stronger radio technology, so there will be a lot of civilization signals in the universe.
Scientists expect to search for cosmic wireless signals through radio telescopes and find regular and mysterious signals. These signals may be sent by alien civilizations. Then we try to decipher these signals, and perhaps we can get some information about alien civilization from them. So have scientists searched for signals of suspected alien civilization in the universe?
So far, scientists have found two wireless signals most likely to be sent by alien civilizations. One was received by Jerry R. Ehman at Ohio State University using the Big Ear Radio Telescope on August 16, 1977. Narrowband radio signals. This signal scientist deciphered only one word “Wow!” after all the hard work, so this signal is also called “Wow signal”.
Another mysterious signal is a mysterious repetitive electrical signal intercepted by a deep-space radio telescope set up by the United States in Australia in 2015. Scientists speculate based on the signal attenuation curve that this signal was sent at a distance of 50,000 light years from the Earth, and it is located near the constellation Ursa Major.
Last year, some scientists claimed to have deciphered this mysterious signal from 50,000 light-years away, but the content made people wonder: “Please instruct us to the fourth universe. There is an explosion here and the situation is very dangerous. The location is in the 12th Milky Way.” Through this deciphered content, we can get a lot of relevant information. For example, this may be a fleet of alien civilizations. It is in danger at this position of the 12 Milky Way, which is obviously a distress signal.
What only makes us wonder what is the fourth universe? 12 Where is the Milky Way? The two important words mentioned in this passage are very important for mankind to understand the universe. If the content of this mysterious signal deciphered by scientists is correct, then we have found evidence of the existence of alien civilization.
In addition, we also know an important thing like the Fourth Universe, and this may be an area we haven’t touched yet, and it may be the name of the advanced civilization in the universe for the division of different regions of the universe. We all know that mankind has also carried out various geographical divisions on the earth, marked with various titles, this is for us to better explore the earth.
The same is true for the universe. If there is an alliance of advanced civilizations in the universe, then for the convenience of interstellar navigation, advanced civilizations will inevitably divide different positions in the universe. The fourth universe may be called the area where the Milky Way is located. The 12 Milky Way is also mentioned later, which may also be a finer regional division of the Milky Way.
If this mysterious signal comes from 50,000 light-years away, judging by distance, it may be located near the center of the Milky Way galaxy. This makes us have to think about a problem, that is, the center of the galaxy may be the gathering place of civilization. In fact, scientists have speculated on this issue for a long time, because near the center of the Milky Way are stars, the most concentrated area of galaxies.
The area where galaxies are concentrated means that there are more resources and energy, and there is also a supermassive black hole, which may also be an important reason for attracting advanced civilizations to gather here. Of course, all of this is just our guess. For human beings, our technology is still very backward, and there is still a long way to go before we get out of the solar system, let alone explore the center of the galaxy.
Whether the content of the mysterious signal deciphered by a scientist last year is completely correct is still not widely recognized by the scientific community. The technology of alien civilization and human technology may be completely different in the direction of technological development. If the radio signal patterns of the two civilizations are completely different, it will be very difficult for humans to decipher the signal of the alien civilization.
In any case, searching for mysterious signals of aliens in the universe is the most likely way for mankind to explore alien civilizations. If humans have the ability to navigate between stars, they can naturally explore other galaxies, so that it is easy to figure out whether alien civilizations exist. But now, we are still a thousand miles away from interstellar civilization, and it is impossible to travel to other galaxies. Therefore, the search for alien civilizations can only rely on astronomical telescopes, unless one day, alien civilizations take the initiative to come to the earth, but at that time, it is a blessing or a curse for mankind, it is difficult to say.