When human beings walked out of the earth to see the universe with the help of science and technology, the topic of extraterrestrial civilization has been uninterrupted. With the continuous development of human science and technology and the continuous improvement of cognition of the universe, the topic of discussing alien civilization has become more and more popular. Especially in 2020, the sighting report of UFOs has increased by 50% compared with the past. Many friends realize that it may not be far away to uncover the existence of alien civilizations.
From the perspective of the vastness of the universe and time, it is difficult for us to deny the existence of alien civilizations. In the eyes of scientists, there is basically no doubt about the existence of aliens. Of course, to prove the existence of extraterrestrial civilization, we still need to find real evidence, but after more than half a century of hard work, we have adopted various methods to search for extraterrestrial civilization, and until now there is still no discovery.
From the perspective of the universe, alien civilizations exist, and there should also be many powerful interstellar civilizations, so the universe should be very lively. But when humans stand in the starry sky, they see the opposite scene. The background of the entire universe is dark, cold and lonely. Apart from the earth, there is no shadow of life.
So where will the alien civilization be? Regarding the inability of humans to find extraterrestrial life, scientists believe that this is mainly related to the relative backwardness of human science and technology. Although human beings have stepped out of the earth and began to explore the universe, our technological development time is very short after all, only about 200 years.
In such a short period of time, it is a very remarkable thing that human science and technology can achieve current achievements. Of course, at this point, no matter how fast human technology develops, there is nothing remarkable. Compared to the universe, human beings are still very small.
With the current human technology, we can’t even explore the solar system, let alone go out of the solar system to explore other galaxies. Alien civilizations exist outside the solar system. Only when we step out of the solar system can we discover alien civilizations. This may be the main reason why human beings cannot find alien civilizations.
Scientists have been doing their best to find the traces of aliens, but there has been no progress. Then what other ways are there to hope to find alien civilizations? Some scientists thought of a way to launch radio waves into the universe and actively expose themselves. Since our technological strength is limited and we cannot go out of the solar system to find alien civilizations, it is better to let the alien civilizations discover us and mainly come to the solar system.
The main reason why human beings cannot get out of the solar system is that our spacecraft is not fast enough. The distance in the universe is in light-years. In the generalized solar system, including the Oort cloud, the radius has reached 1 light-year. At the speed of human spacecraft, it takes at least tens of thousands of years to travel through a light-year.
The speed of our spacecraft is not high enough to realize interstellar exploration, so can we not actively expose the existence of human beings? Of course not. According to Einstein’s theory of relativity, the limit speed of an object is the speed of light, and the matter that can reach the speed of light in the universe includes photons and electromagnetic waves. And human beings have mastered the preliminary radio communication technology, which can realize the wireless signal transmission at the speed of light.
Human spacecraft cannot get out of the solar system to reach other galaxies, but the speed of radio wave signals can reach the speed of light, and it can get out of the solar system and spread to the universe, thus attracting the attention of alien civilizations. This method seems very reliable. There is indeed a great hope for alien civilizations to know about the existence of the earth and human beings. Is this a good thing?
Is it a good thing for humans to take the initiative to expose themselves and let the alien civilization know? In this regard, scientists also hold the same opinion. For those who are eager to find alien civilizations, they naturally think this is a great thing. As long as alien civilizations take the initiative to contact humans, then the existence of alien civilizations can be confirmed, which is naturally extraordinary for humans.
However, some scientists have raised objections to this. For example, the famous physicist Hawking, who strongly opposes the search for alien civilizations by humans, has repeatedly warned: humans should not try to contact alien civilizations. Dangerous things. When the Chinese Sky Eye was completed, Hawking once again issued a warning: He believed that my country’s Sky Eye might expose the existence of human beings to alien civilization.
There are not many scientists who hold the same views as Hawking. They believe that although this method is fast and effective, it is indeed highly possible for alien civilizations to discover humans, but if they actively expose humans’ own coordinates, the risk index will also be greatly increased.
According to the simulation study of scientists, it is found that although the energy intensity of human wireless signal is still relatively low, there is no problem in spreading to galaxies within 1000 light-years at the current energy level. If there is an extraterrestrial civilization 1,000 light-years away from the earth, the extraterrestrials will find that there are many infrared light waves in the solar system through observations, and they will find the existence of radio signals.
Through these observations, the alien civilization will naturally know that there are many living things on the planet Earth, and there is also an intelligent civilization that has entered the age of science and technology. In addition, alien civilization can roughly estimate our strength based on the strength of human wireless signals.
Through the wireless signals sent by human beings, the alien civilization knows the existence of life on earth, the existence of human beings, and the strength of human civilization. If an alien civilization is already a powerful interstellar civilization with the ability to cross the interstellar, then the distance of 1,000 light-years is a very short span for the interstellar civilization.
Alien civilization is very likely to come to the solar system to come into contact with mankind. If alien civilization is friendly to mankind, then it may be an opportunity for mankind. With the help of alien civilization, mankind may save a long period of development. Time, quickly grow into an interstellar civilization, out of the solar system.
But if alien civilization is malicious to humans, then the arrival of aliens may be a catastrophe for the earth and for humans. Although in many science fiction films, alien civilizations invaded the earth and ended in human victory, in reality, the results in science fiction films are basically difficult to achieve.
The reason is simple. Even if the difference between science and technology is only 100 years, the strength of civilization is the same as that of heaven and earth. Just imagine that the current scientific and technological strength of mankind completely beats the technology of 100 years ago. If the current human army can travel back to 100 years, can the human strength of 100 years ago defeat the modern army? I believe everyone knows that it is impossible.
According to the current development speed of human science and technology, it will take at least 1,000 years for us to become an interstellar civilization and have the ability to sail across the stars. Therefore, once an alien civilization can come to the solar system, the technological strength of this civilization will be at least 1,000 years ahead of us. Do we have any hope of victory? Obviously impossible.
Therefore, it is not a good thing for humans to take the initiative to expose themselves and allow alien civilizations to discover. For the current human civilization, the solar system in this remote location of the Milky Way is a lucky thing. We should make good use of this advantage to hide ourselves. Before you have enough strength, don’t expose yourself easily.