After human beings walked out of the earth, the search for extraterrestrial civilization has never stopped. From the perspective of the universe, the probability of the existence of alien civilization is basically 100%, but we have spent more than half a century of efforts to search for extraterrestrial life and alien civilization through various methods, but until now there has been no discovery.
In theory, it should be 100%, but in reality, there is no discovery. This has puzzled many scientists. Regarding this question, the famous physicist Fermi of the last century also raised his own doubts: they where? This doubt became the Fermi paradox that everyone knows later.
In Fermi’s view, the vast universe is too large for us to imagine. Even within the range of 93 billion light years observable by humans, there are at least trillions of star coefficients like the Milky Way, and every Milky Way is at least There are hundreds of billions of star systems, so the number of planets is too large to describe with numbers.
With such a huge base number, as long as the probability of the existence of extraterrestrial civilization is greater than zero, then the number of life planets in the universe and the number of intelligent civilizations must also be a very large number. If this is the case, then the universe should be relatively lively, and there should be some traces related to civilization.
Although in the actual observation, the universe we see is silent, without any trace of civilization. Regarding the Fermi Paradox, many scientists have also put forward their own observations. Some scientists speculate that our solar system may be a laboratory of advanced civilizations. The entire outer galaxy is shielded by advanced civilizations, and human information cannot be emitted. And alien civilizations cannot observe the solar system.
There are also scientists who believe that the world we live in may be a virtual universe, and everything including humans may be just some program codes. These speculations have not been recognized by many people. In most people’s opinion, the main reason why humans cannot contact alien civilizations is the issue of distance.
We must know that the vast universe uses light years as the basic unit, and the speed of light in the universe is only the speed of a tortoise. To explore freely across the interstellar, perhaps only by breaking the speed of light, no civilization can truly explore various galaxies before breaking the speed of light. After all, the lifespan of life bodies is very limited, and the time spent on an interstellar voyage may be at least Also more than thousands of years.
Take the nearest neighboring galaxy to the solar system as an example. Through observations, scientists have also discovered terrestrial planets similar to the Earth in the neighboring galaxy. They also speculate that there may be living planets or even intelligent civilizations there. However, at a short distance of 4.2 light-years, even if we achieve sub-light speed flight, it will take at least hundreds of years to reach it. At the current speed of human aircraft, it will take hundreds of thousands of years.
It can be seen from this that even if we will explore the neighboring galaxies in the future, there is a high probability that we will only send unmanned interstellar probes instead of humans to go there. The reason is also very simple. The life span of humans cannot support an interstellar journey.
Human beings are limited by the exaggerated interstellar distance and limited speed, and cannot really travel to the outer galaxy to explore, so may countless alien civilizations too. An extraterrestrial civilization that may be more advanced than humans has also discovered the existence of the solar system and the earth through a telescope, and it is also speculated that there may be civilization on the earth.
However, because the distance between the stars is too exaggerated, the extraterrestrial intelligent life form cannot personally explore it, but even so, the alien civilization may also come to the solar system, and that is to send interstellar probes. For a detector, theoretically, as long as there is no accidental halfway destruction, it can continue to sail for tens of thousands of years, hundreds of thousands of years, or even hundreds of millions of years.
Scientists naturally thought of this. Humans also sent Voyager 1 and Voyager 2 in the last century. They both carry a compact disc that records information about the earth and human beings. The mission of Voyager is to carry The greetings of human beings have been moving forward to the outside of the solar system. As long as the journey goes smoothly, it can reach the center of the Milky Way galaxy. Of course, this time will be extremely long.
The human Voyager spacecraft went out of the solar system, after many years of sailing, passing by a civilized planet, then it is possible to be discovered by civilizations on this planet. When an alien civilization sees an extraterrestrial probe such as Voyager, it will naturally believe that there are other intelligent civilizations in the universe.
In the same way, as long as we can find out-of-system probes, then we can prove the existence of extraterrestrial civilization. So have any probes of extraterrestrial civilization visited in the solar system? Before mankind got out of the solar system, we didn’t know whether any alien civilization probes had reached the earth in the long billions of years.
During the time when human beings walked out of the earth, we observed only one out-of-system visitor, and that was a mysterious celestial body that entered the solar system on October 19, 2017. For this mysterious celestial body, I believe many friends also know that scientists named it Oumamo, and it was the first outside visitor discovered by human observation.
The mainstream scientific view believes that Aomomo is just an interstellar celestial body, nothing special, but in the eyes of a few scientists, this Aomomo may not be ordinary, and it may not be an interstellar celestial body either. Why do a few scientists put forward the opposite view? Mainly, there are some unsolved mysteries in Aomomo.
The out-of-system visitor Oumomo is very different from the asteroids or comets we know, first of all, its peculiar shape. We all know that the celestial bodies in the universe are affected by gravity. The shapes of celestial bodies are basically spherical, and the asteroids and comets in the solar system are basically spherical.
Even if some asteroids have strange shapes, they still exist as irregular spheres. But Omomo is different. It is a long strip of celestial body with a length of about 400 meters and a width of about 40 meters. This is the first time we have discovered such a long strip of celestial object. Is it really an interstellar celestial body?
In addition to its strange shape, what really confuses scientists is its speed. If it is a celestial body, its speed after entering the solar system will basically conform to the laws of celestial movement. We can use some physical calculations to find that it is different. The speed of the location.
However, by January 2, 2018, the deviation between the actual flight orbit and the calculated orbit of Omomo had reached 40,000 kilometers, and by May 3, the deviation had reached 100,000 kilometers. This means that some unknown mechanism is driving Omomo to fly.
Especially when Oumomo is going to leave the solar system after turning around at perihelion, it will leave at an accelerated rate, which does not meet the requirements of a gravitational slingshot. It is this strange speed change that makes some scientists doubt the identity of Aumamo.
Some scientists speculate that this Aomomo may be a disguised interstellar probe, a smart interstellar probe launched by an alien civilization very far away from us. In order not to be identified during interstellar travel, the alien civilization uses the probe The star is disguised so that when it passes through various galaxies, even if it is observed by other intelligent civilizations, it will only be regarded as a celestial body and will not attract more attention.
This may be because the alien civilization does not want to expose itself, thus bringing potential risks to itself. Only the interstellar probe may have the power to freely change the speed, so that it can avoid being pulled by the gravitational force of some massive celestial bodies and losing the power to continue interstellar navigation.
If Oumomo is an interstellar probe, then when it passes the earth, the human presence may have been exposed. The intelligent program on the probe may have transmitted information about the existence of the earth and humans back to the civilization in which it is located.
Of course, even if the alien civilization receives the information sent back by Omomo and knows the existence of the earth and human beings, we don’t need to worry too much. According to the current scientists’ exploration of the origin of Oumomo, it may come from the starry sky at least thousands of light-years away from the earth.
If there is no super-light speed technology for this distance, then alien civilization will not be able to come to the solar system. At most, it will send more advanced probes to explore the solar system in more detail in the future.
The above are just some of our speculations. What is the true identity of Aumomo? Further research and exploration by scientists are needed. It’s just that with the current human technological strength, we can’t catch up with Aomomo. Maybe we can only wait until the future technology is more advanced and with a faster speed. There will be unexpected major discoveries.