We have seen witness reports about the alien aircraft UFO in some domestic or foreign media reports. We cannot verify the authenticity of the matter in detail, and there is no official confirmation. But one thing is certain that our earth civilization will never be the only existence, but should be one of the cosmic civilizations.
In the infinite universe, there are galaxies and nebula of different shapes and countless galaxies. There are planets with extremely different environmental differences in each galaxy, and different states, volumes and mass. Maybe someone will ask? Do they have alien life? No one can give a specific answer. Of course, there are always people who believe that there are aliens, but so far there is no conclusive evidence to confirm this.
fantasy alien life
Example: People found microorganism fossils in the Mars meteorite, and a large number of reports of aliens visiting the earth, and the flood of science fiction novels and movies has made the rumors of alien life vivid. However, these evidences are not enough to prove the existence of alien life. For a long time, the scientific community has been ridiculing the existence of alien life such as UFO .
1947 crash of the US Roswell UFO caused an uproar. Later, the US Department of Defense claimed that this was not true, claiming that it was an explosion of air balloon . However, the US "51 Zone" has always been a forbidden zone for ordinary people. The US military kept silent about this, and no one could confirm what kind of scientific research was being conducted there. There are rumors that there were alien activities there, but no one had actually seen it. However, humans' exploration of alien civilizations has never stopped.
Currently in the solar system, people have not found any evidence of extraterrestrial life, and there are only some sighting reports about the UFO that have not been officially confirmed. In addition, the alien base on the back of the moon is just speculation and has not been confirmed. After the US "Apollo 11" spacecraft landed on the moon, the US government terminated the project to continue lunar exploration .
Apollo 11 astronaut took his footprints when landing on the moon
It is said that large alien spacecraft and bases for alien activities were found on the back of the moon. The astronauts received warnings from aliens. The US government stopped continuing the lunar exploration due to the safety of the astronauts, but all this has not been officially confirmed by the United States.
In short, the existence of alien life should be certain, but based on the current scientific and technological level of our humans on Earth, they cannot be discovered and found. According to the data and photos sent by the US Voyager 2 satellite, no extraterrestrial life has been found in the solar system. However, according to the data research on the environmental detection and transmission of Europa , the scientific community believes that there is a large amount of liquid water on Europa, and there may be life forms.
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If alien life can be found on Europa, then we have real neighbors in the solar system, which we are looking forward to.
Life is wonderful, and it is the reproduction of life that makes the earth lively and full of atmosphere. The conditions for the existence of life are very harsh. The celestial body located must have a hard shell, a suitable atmosphere and a suitable temperature, and a certain amount of liquid water. At the same time, the celestial body surrounding the planet must be a stable star.
In terms of the solar system, only Venus, Earth and Mars meet the above conditions. Among them, the Earth is located between Venus and Mars, and is in the most favorable space for life to reproduce. There is no life on Venus and Mars yet. It is even less suitable for life on other planets in the solar system.
Allen Telescope Array
At present, there are three main methods to explore extraterrestrial civilizations:
① Receive and analyze various possible radio waves from space . Work on this aspect has been in 1960.
② Humans actively send signals to outer space that indicate the existence of humans in the solar system.On November 16, 1974, the United States used a radio telescope with a diameter of 2305 meters in Arecibo located in Puerto Rico to send out the first set of human signals, aiming at Perseus globular cluster , and launching for 3 minutes.
③ Launch the probe to visit aliens. After completing the detection mission in the solar system, the "Pioneer" launched by the United States, the "Voyager" 1 and "Voyager" 1 and 2 brought a lot of human information. As human messengers, roaming in interstellar space. If they encounter human soulmates by chance, they will understand human activities from the probe and determine the possibility of further interaction. It can be seen that exploring extraterrestrial civilization is a comprehensive scientific mission. Too optimistic is unrealistic, and too pessimistic is unfounded.
In fact, scientists believe that the claim that an extraterrestrial civilization once visited and is still monitoring humans near the earth is unreliable.
China Sky Eye
Someone once calculated that if There are 1 million civilizations in in the Milky Way galaxy, and only one spacecraft arrives on the earth every year, then there are about 10 billion spacecraft launched in the entire Milky Way every year, and the metal required to make these spacecraft is about 1% of all metal reserves in the Milky Way. In other words, a civilization can only reach the possibility of visiting us by giving all its own money, and the possibility of artificial objects like Voyager being discovered by another civilization is basically negligible. The conclusion of
may be very disappointing, those that were originally exciting to be the waving saucer and aliens all turned into. Maybe you want to accuse me of breaking some people's dreams, but there is more exciting and serious scientific research in the world: although scientists disdain the legend of UFOs and aliens, they have been committed to scientifically searching for signs of extraterrestrial life.
The famous British physicist and mathematician Stephen Hawking said in the documentary that there is a great possibility that aliens exist, but humans should not take the initiative to find them and should do everything they can to avoid contact with them.
The famous British physicist and mathematician Stephen Hawking
Hawking said that in his opinion, alien life is very likely to exist in the form of microorganisms or primary organisms, but it cannot be ruled out that there may also be higher intelligent creatures that can threaten humans. Maybe their level of civilization is even far beyond our imagination.
"I think some of them have exhausted the resources on the planet they live in, and may live on the huge spaceship ," he said. "These high-level aliens may become nomads, trying to conquer and colonize all the planets they can reach."
Hawking believes that given that aliens may loot the earth's resources and then leave, humans actively seek to contact them "a little too risky." "If aliens visit us, I think the result may be similar to Christopher Columbus's entry into the American continent. That's not a good thing for the local Indian ."
American historian Neil believes that powerful civilizations on earth always control weaker civilizations. He believes that when they establish connections with extraterrestrial civilizations that are much higher than ours, it may "suppress" our civilization until it is assimilated in a higher civilization.
Chinese mathematician and linguist Zhou Haizhong put forward the point in the paper "Cosmic Linguistics": As long as they are advanced intelligent life, their reason determines that they must treat all intelligent life forms in the universe with a proper degree, so aliens and Earthlings will be able to coexist peacefully, cooperate in friendly terms and develop together in the future. All possibilities above
are based on the thinking of our humans on earth. If one day we really establish a connection with extraterrestrial civilizations, we cannot know what the result will be.
Searching for extraterrestrial civilizations is a serious scientific study. When will we get the answer? Maybe it's tomorrow, maybe it's 10,000 years. Since life on Earth can be produced and evolved from inanimate matter, similar stories may occur on other planets in the universe.
Voyager No. 2
History modern scientific research shows that the earth is not unique in the universe. There are many planets like the Earth, almost all over the universe. Therefore, the possibility of extraterrestrial life is being accepted by more and more people.
People believe that there are three reasons for extraterrestrial life: First, the number of areas suitable for life in the universe is large; second, elements found in the earth and the solar system, such as C, H, O, N, and other basic elements that constitute life are also spread throughout the universe; third, organic compound reactions can be carried out under many environmental conditions.
Scientists discovered ordinary organic molecule ribonucleic acid in the interstellar cloud, which further supports the theory of the existence of extraterrestrial life.
In addition to using "passive monitoring" to find extraterrestrial intelligent life, scientists also try to actively contact them. To carry out this activity, the first thing we encounter is undoubtedly the problem of "communication language".
Scientists have been speculating that mathematical language may be the common language of every civilization. American astronomer and popular science writer Carl Sagan said in his monograph "Contact of the Universe" that no matter how different the technological civilizations in the universe have a common language - mathematical language.
Chinese mathematician and linguist Zhou Haizhong also pointed out that mathematical language has the characteristics of scientificity, accuracy, simplicity, abstractness and universality, and is an ideal tool for cosmic communication.
Chinese mathematician and linguist Zhou Haizhong (first right)
Therefore, mathematical language has become the preferred medium for the connection between humans and extraterrestrial intelligent life. Scientists at the Institute of Extraterrestrial Civilization Search in California are planning to compile the entire content of Wikipedia into mathematical language information, and send it to space 20 light years away through radio telescopes, and hope that extraterrestrial intelligent life can receive this information to understand the earth's civilization.
In addition, scientists also try to use images, music, and sending physical objects to try to contact intelligent life outside the earth.
British physicist Stephen Hawking He also believes in the existence of extraterrestrial intelligent life. But he warned that humans may bring disaster upon proactive contact with them. Despite this, many scientists are optimistic, confident and proactive in finding extraterrestrial intelligent life. For example, American astronomer Seth Shostark recently stated that we should strive to actively establish friendly relations with them while accelerating the pace of finding them. The search process is more meaningful than the results obtained.
The vast universe
Human exploration of extraterrestrial civilization will not stop. With the development of human civilization and technology, one day in the future we will definitely find our neighbor of our earth civilization - extraterrestrial civilization.
Edit: Nuanyang
Contribution: Nuanyang
Reference
NetEase | A disk-type UFO crashed over the United States witnessed
Baidu | Explore Galileo satellite and discover possible traces of life of Europa
Zhonggong.com | Why is the US lunar exploration plan twisted and turns
Phoenix.com | Hawking warned the earthlings to "don't talk to aliens"
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