When human beings walked out of the earth to see the vast universe with the help of science and technology, an eternal topic appeared, that is, does alien civilization exist? It is possible that before humans have left the earth, they are still very skeptical about the existence of extraterrestrial civilization. But when we truly stepped out of the earth and saw the vastness and mystery of the universe, most people no longer doubted the existence of alien civilizations.
Scientists at the pinnacle of mankind naturally know much more about the universe than we do. Therefore, in the minds of astronomers, there is no doubt about the existence of alien civilization. If you ask Hawking: Does alien civilization really exist? He will answer without hesitation: That is affirmative.
Some people might say, since alien civilizations exist, why have we not discovered anything until now? Haven’t found an alien civilization? In fact, we can’t blame us for not working hard. The main reason is that human beings have limited scientific and technological capabilities. Now we can’t even go out of the small solar system, let alone go out of the solar system to search for alien civilizations in other galaxies.
Even if there is an extraterrestrial civilization in the nearest neighboring galaxy, we will not be able to observe it at all, but have discovered it at all. Unless extraterrestrial civilizations take the initiative to come to the solar system and make contact with humans, it’s just that at that time, it will be very difficult whether what is waiting for us is a blessing or a curse.
With the continuous advancement of human science and technology and the continuous improvement of the cognition of the universe, more and more people believe in the existence of alien civilizations, so many people will raise the question: if alien civilization invades the earth, humans’ current technology can Victory? Different civilizations are completely two different races, and within human civilization, in the history of civilization for five thousand years, there have been many wars. Even in the modern era of peace, small wars have never disappeared from the earth. .
There will always be aggression within human civilization, not to mention alien races that are completely different from humans. Therefore, there is a very high probability that things like alien civilizations invading the earth will happen in the future. If there is such a day, will mankind be able to defeat alien civilization? Maybe many people have seen many science fiction movies about aliens invading the earth. In the movies, the final outcome is that humans have defeated alien civilizations.
This is the plot in a sci-fi movie. In the beginning, humans were not rivals, but in the end humans miraculously turned defeat into victory. This kind of movie plot makes many people have the wrong perception that although alien civilization is stronger than human beings, because the earth is the home ground of human beings, they are invaders, and they will all fail in the end. Human beings are still the masters of the earth.
So in the real universe, if an alien civilization actually invades the earth one day, can mankind be able to overcome it? Below we will carry out some simple analysis on this. After reading these analyses, I believe you will have a clear answer in your mind.
First of all, we all know that if an alien civilization can come to the earth, there is a high probability that it will also be a technological civilization like human beings. Only the power of science and technology can break through the limitations of the interstellar. It is necessary to know that the vast distance of the universe is measured in light-years. One light-year is equal to 9.460 billion kilometers. With the fastest aircraft of mankind, it takes at least this light-year to fly. More than ten thousand years.
And we all understand that there is only one intelligent civilization in the solar system, and the closest star system to the earth is the Biling Galaxy, which is about 4.2 light-years away from the earth. Even if it travels at the speed of light, it takes more than 4 years to reach this distance. Therefore, if humans want to travel to the Biling galaxy, they must at least master the sub-light flight technology, so that they can hope to reach Biling in their lifetime. .
Imagine if we know that there are habitable planets suitable for human survival in the Pied Galaxy, and we want to colonize there. Will we send spacecraft to spend thousands of years, hundreds of years to go there? The answer is no, because human life span is only a few decades. Only the speed of our spacecraft can take decades to reach the neighboring galaxy before colonization begins.
In the same way, if there is a powerful alien civilization in the Piranha galaxy that can come to the earth and want to invade the earth, then the strength of this civilization is at least the primary interstellar civilization, and at least it has mastered the subluminal flight technology that humans can’t reach. It only takes a few years or decades to be able to come to Earth. Human beings are still far from the primary interstellar civilization. In the best case, it may be a technological gap of hundreds of years.
If this gap is in the ancient times of mankind, before the age of science and technology, the century-old civilization gap will naturally be nothing. Even if there is a difference of a thousand years, the impact will not be great in the era of cold weapons, but after entering the era of science and technology, even the technological gap of 10 years is very obvious. If mankind can now travel back to 100 years ago, I believe that as long as we carry modern weapons, only a few people will be able to dominate the world 100 years ago.
An elementary interstellar civilization has at least 100 years of technological gap with humans, but don’t underestimate this one hundred years. That is the gap between the sky and the earth, the gap between the entire tree of science. Let’s take energy as an example. The continuous increase in speed is actually the continuous upgrade of energy technology. With the current fossil energy of mankind, the speed of spacecraft can never reach sublight speed.
Therefore, if the speed is to be qualitatively improved, energy also needs to be qualitatively improved. And this kind of energy is controllable nuclear fusion. Mankind started researching it 50 years ago, and the progress is still slow until now. Even if we give mankind another 100 years, we may not have any hope of realizing controllable nuclear fusion. And the primary controllable nuclear fusion technology is quite different from the mature nuclear fusion technology.
If an alien civilization can cross the interstellar to the earth, then the energy application of this civilization has at least reached the mature nuclear fusion technology. Only in this way can it become an interstellar civilization and have the ability to travel across the interstellar. The difference in energy sources often also represents the difference in weapons. After human beings first learned about nuclear energy 50 years ago, they developed devastating nuclear weapons. This is the ultimate weapon of mankind at present.
If an alien civilization has mastered mature nuclear fusion technology, it will naturally develop more powerful weapons of destruction on this basis. The power of such weapons is far from comparable to our nuclear weapons. For an interstellar civilization, energy weapons are the core, so it is inevitable to develop energy weapons based on nuclear fusion. Such weapons may be able to quickly destroy a planet.
In fact, apart from directly using energy weapons to attack the earth, there are too many ways for an interstellar civilization to destroy the earth. Even without using energy weapons, there are many ways to attack the earth, such as using asteroids. You must know that there are hundreds of millions of asteroids between Mars and Jupiter, and there are many asteroids even in the orbit of the earth.
Alien civilization can drag these asteroids and let them hit the earth. We all know how terrifying the impact of asteroids on the earth is. 65 million years ago, an asteroid with a diameter of only 10 kilometers hit the earth, killing more than 80% of the life on the earth. If an alien civilization drags an asteroid with a diameter of 100 kilometers from the asteroid belt and hits the earth, then any life will cease to exist.
It can be seen that the alien civilization relies on powerful strength and uses many methods to destroy the earth. This situation is limited to the idea that alien civilizations do not want to colonize the earth, but only want to destroy the earth. If alien civilizations want to colonize the earth, they will not adopt such a destructive method, but will eliminate mankind through civilized wars.
No matter what, is there any hope for mankind to overcome? The answer is also very slim. The huge gap in technology will inevitably create a huge gap in weapons. For the alien civilization, all kinds of human weapons may be toys, and there is not much threat. In the face of powerful weapons, a large number of people is actually useless. As long as the alien civilization destroys the satellites in the Earth’s low-Earth orbit, we will be completely blind, and many powerful weapons will be useless.
Some people might say that if an alien civilization infects the earth’s virus, wouldn’t it just end? In fact, this possibility is very small. Imagine that since alien civilizations invaded the earth, they will naturally have a detection and understanding of the ecological environment of the earth, and naturally know what things on the earth can threaten them.
And detecting the environment and microbial threats of a planet is not a piece of cake for interstellar civilization? Therefore, if there are viruses on the earth that can threaten alien life, then the alien civilization will definitely take various preventive measures in advance, so the earth’s viruses and other microorganisms will basically not threaten the alien civilization.
Through the above analysis, I believe many friends understand that if an alien civilization that can cross the interstellar to the earth is hostile to the earth and wants to invade the earth, then human beings will have no resistance. This is the case, so Hawking has issued many warnings to mankind to explore extraterrestrial civilization during his lifetime. Hawking warned: humans should not try to find alien civilizations, because of temporary curiosity, it may bring a devastating crisis to the earth and human civilization.
Before human beings are truly powerful, we’d better develop in the solar system awkwardly, when will we become an interstellar civilization, and then go out of the solar system to explore alien civilizations. I believe that at that time, even if we did not take the initiative to look for it, we could still come into contact with many intelligent civilizations outside the solar system. Only with strong scientific and technological strength can we truly protect the safety of the earth and the safety of mankind.