There are eight planets in the solar system, and only the blue planet Earth is suitable for human survival. The beauty and specialness of the earth can be seen at a glance as long as we step out of the earth and compare with other planets. If you put the eight planets together, you will find that the earth is the most dazzling star among them. It is so beautiful and exudes blue brilliance.
This may be the unique demeanor of the earth as a planet of life. It is very beautiful to see the earth from space. Even if it is billions of kilometers apart, standing in a distant starry sky to see the earth, although the earth was as small as a grain of dust at that time, it is still A unique blue dust can be easily distinguished from numerous dusts.
It is a very happy thing for human beings to survive on the earth. It is precisely because of the earth’s perfect ecosystem that life can safely and stably evolve and evolve for 4 billion years, so that human beings can be born and continue to develop into the current technological age.
For our homeland, we should take good care and protection, but I believe that friends know that as human beings enter the industrial age, with the rapid development of science and technology, the secondary use brought by industrial science and technology has continued to appear and become more and more intense. . The deteriorating ecological environment brought about by industry is obvious to all.
Especially in recent years, there have been more and more ecological problems caused by global warming, the earth’s climate has become more and more abnormal, and there have been more and more natural disasters. These changes on the earth are bad news for all life. With the continuous improvement of human understanding of the universe, we also know that the lifespan of the earth is not unlimited, it also has a limit.
So how long is the life of the earth? Can human beings continue to follow the earth? Speaking of the life of the earth, we must first understand the life of a sun. Because the life of the sun directly determines the life of the earth, in fact, the life of a planet does not have an absolute value in a sense. How long it can exist depends largely on the surrounding stars.
It is difficult for us to determine how long the planet’s life is? However, the life span of a star is easy to understand. We all know that a star is actually a huge celestial body that continuously undergoes controlled nuclear fusion at its center and continuously burns, glows, and generates heat. The source of its luminescence and heat generation is the central nuclear fusion, and nuclear fusion requires fuel, and the fuel of stars is hydrogen.
The lifespan of stars varies greatly according to their mass. Supermassive stars have a relatively short lifespan, which may only be tens of millions or hundreds of millions of years. The sun is a yellow dwarf star, a medium-mass celestial body in the star family, and its life span is about 10 billion years. The current sun has been burning for about 4.57 billion years, which is nearly half of its life span.
If there are no accidents, the life of the sun is about 5 billion years. After 5 billion years, the hydrogen in the sun will almost be exhausted. At this time, the core of the sun will collapse, leading to a sharp rise in temperature. At the same time, the outer shell rapidly spreads outwards, constantly devouring surrounding planets. Mercury, Venus, and the earth will all be swallowed by its expanding orbit and become the dust of the universe.
Therefore, theoretically speaking, the earth will be swallowed by the sun in 5 billion years, and it will end and be destroyed. 5 billion years, this is an extremely long time, even if it is placed in front of the age of the universe of 13.8 billion years, it is still not a small number. Some people will say that human civilization can continue to follow the earth for 5 billion years, which is also a very proud thing.
But can human beings last so long? The ultimate lifespan of the earth may still be 5 billion years, but life on the earth may not be able to last that long. We must know that the ecological environment of the earth is not immutable, but will change dramatically every once in a while, leading to mass extinctions.
In the history of life on the earth, there have been too many small extinction events to be counted, and there have been five mass extinctions, each of which led to the disappearance of most species. Through the mass extinction event, we can see that life on earth belongs to the “circular” mode.
Nature will not allow life on earth to evolve and develop so peacefully, but will shuffle the cards every tens of millions of years or hundreds of millions of years, and make most living things go extinct. There was a glorious age of dinosaurs in 65 million years. At that time, the overlord of the earth was dinosaurs. They had dominated the earth for 160 million years, and races spread all over the world.
But even so powerful, the dinosaurs all over the world became extinct and disappeared because of the arrival of the fifth mass extinction, which became history. This shows that nature is ruthless. Once the mass extinction is initiated, any species may face the end of its fate.
Although human beings are intelligent beings, we cannot guarantee that they will survive the sixth mass extinction. Some people may say that the next mass extinction is still very far away from us, and there is nothing to worry about. Is this really true?
Scientists once predicted that the earth may have entered the cycle of the sixth mass extinction. We are seeing more and more natural disasters, the ecology is accelerating, and more and more biological species are extinct every year. These phenomena and disasters may be the early signs of the sixth mass extinction.
As time goes by, it may not take many years before the ecosystem will collapse. At that time, the mass extinction of organisms may enter the peak stage, and a large number of organisms will begin to extinct. If mankind had no way to deal with it at that time, then those waiting for mankind might have the same fate as dinosaurs.
Faced with the power of nature, there is no way for us to stay on the earth. Therefore, scientists believe that once the sixth mass extinction of the earth in the future enters the peak period and the real mass extinction arrives, then the only way out for mankind is to emigrate to other places. On the planet.
Therefore, in recent years, we can see that scientists have accelerated the exploration of Mars and accelerated the pace of space technology research. Only the stars and the sea are the future of mankind, shrinking on a small earth, it is difficult for mankind to continue for a long time.
Only with the ability to migrate to the outer planet, then humans can get rid of the bondage of the earth, even if the earth has N mass extinctions in the future, it will not affect the continued development of mankind. Once human technology has developed to an advanced stage, perhaps we still have the ability to change the destiny of the earth’s destruction. 5 billion years later, when the sun expands to swallow the earth, we can move the earth outward or even permanently out of the solar system to make homes in other galaxies.
So, how long is the life of the earth? It may be an unanswerable question. The lifespan of the earth theoretically depends on the sun, but due to the emergence of human beings, the lifespan of the earth may depend on us to a greater extent in the future. As long as mankind can continue to develop, technology will continue to upgrade, and it will become a very easy task to change the destiny of the earth in the future.