How did the universe form and how did it develop? Are people's predictions about the sun correct?
Outside the earth is a vast and boundless world. This is what we call the universe, and the universe is an infinite world. Cosmology is a general term for various celestial bodies and diffuse objects in the universe. Space is a physical world in constant motion and development. So are people's statements about the formation of the universe correct, and what is the ultimate fate of the sun?
01
origin of the universe
1. When did the universe form?
This has been a thought-provoking question for more than two thousand years, from ancient philosophers to modern astronomers. Since Copernicus Hosier and Hubble made a new exploration of the solar system and the Milky Way universe trilogy, the universe is no longer a mysterious and abstract philosophical concept, but a science based on astronomical observations and physical experiments. modern science. Until today, scientists are not sure that the Big Bang happened 15 billion years ago. Before the big bang, all matter and energy could be concentrated together and condensed into a small volume, very high temperature, very high density, and then the big bang happened.
2. The origin of the universe
The explosion was a scattered attack of matter, and the universe continued to expand and cool down. Then there were galaxies, stars, planets, and life in the universe, and so on. Formed gradually during expansion and cooling. In 1927, the Belgian scientist Lemaitre proposed the Big Bang theory, which had a profound impact on the academic world. He believed that the matter from the primordial universe was gathered in a superatomic egg and split into countless fragments in the incomparable big bang. The formation of the universe today.
In 1948, the physicist Gamafu and others described the starting point from fiery to mysterious, after the big bang 15 billion years ago, after a series of evolution of elements, finally formed a clear the entire expansion evolution process . Big Bang cosmology is the most influential theory in modern cosmology, also called Big Bang cosmology, which can explain some observed facts better than other universe models. Most importantly, our universe has a history of evolution from hot to cold.
During this period, the cosmic system is no longer standing still, but constantly expanding, and the density evolves from dense to sparse, just like the big bang. From the perspective of the big bang, the temperature in the early universe was the highest , about 10 billion, and the matter The density is also very high, and the entire universe has reached a balance, and there are only basic particle forms such as bugs, photons, and neutrinos in the universe.
02
ultimate fate of the universe
What is the ultimate fate of the universe? Will the earth still exist? For thousands of years, human beings have been thinking about these issues, especially in the era of technological development, people's understanding of the universe is deepening, and scientists are also thinking about these issues. Since nothing in the universe can escape the law of life and death, does the universe itself have a law of life and death?
Finally, most modern scientists believe that the universe originated from a singularity after the big bang , the universe began to expand, and gradually cooled, thus forming the universe today, these substances, such as galaxies, stars, planets, were all successively after the big bang Generated, then, will this expansion continue? Although scientists can't give a definite answer yet, some scientists have made the following speculations about the fate of the universe: some scientists believe that the final outcome of the universe may become hotter and quieter, and some scientists point out that the universe will eventually consume All the energy of the stars, then fall, when the universe becomes black, there is no more light and heat, the stars after death will evolve into white dwarfs with different properties, maybe you will wonder how the life of neutron stars and black holes was in that era evolved?
Although a black hole is an extremely powerful devouring celestial body, it can devour everything in the universe, but you must know that no matter can escape the gravitational force of a black hole, even light, when a massive star disappears into a black hole, the black hole will continue to flow It is worth noting that if all the matter in the universe is swallowed by the black hole, this means that the black hole may starve to death, because scientists have said that the black hole does not just go in and out, it even It will release Hawking radiation, which can consume part of the energy of the black hole and force the black hole to evaporate slowly. That is to say, when there is no matter in the universe for the black hole to swallow, all black holes will eventually disappear, and the universe will have nothing at this time. Scientists They believe that the final fate of the universe will be a big squeeze, because today's universe is constantly expanding and expanding, which is the original big bang of the universe, the original big bang of the universe.
03
The ultimate fate of the sun studied
When the sun is exhausted for 12 billion years, it will gradually become a white dwarf star, and finally release the afterglow . The fragments would slowly cool down in space. Before long, it will disappear completely. After a trillion years, the stars in the universe will burn up like the sun and die. At this time, the universe is filled with a large amount of stellar debris. After 20 trillion years, when the last star disappears, the afterglow will become the only light in the universe filled with black holes. For a long time, there were only black holes in the universe. The world finally ushered in eternal darkness.
Some scientists speculate that within 100 years, the last black hole in the universe will be completely gone. At that time, only photons existed in the universe. Photons approach absolute zero during the expansion of the universe. When the last photon disappears in the universe, everything is at the same temperature. Until then, the story of the universe will slowly end. Apparently, this is the first time the universe has entered a state of nothingness since the birth of the universe. Shit also chooses to stop moving forward because you know that due to the expansion of the universe, everything will disappear into the darkness of the future.
Or, is this really the day when humanity is doomed? In fact, for everyone , we don't have to worry about these things at all, because in addition to the huge changes in timing and possibly unforeseen, all this may not happen until hundreds of millions of years later, so for human beings, This is not an important issue at this stage. Also, humans don't seem to need to worry about their fate. Eventually, even if nothing else changed, over such a long period of time, genetic drift alone would be enough to make human offspring completely different from who we are today.
Later, Friman Dyson, a physicist at Princeton University in the United States, said that the accelerated expansion of the universe was the bad news brought about by the discovery of dark energy, which meant that humans would eventually lose contact with most galaxies, thus greatly limiting what humans can achieve. gained energy. Obviously, in the long run, this is a very bad situation , and surprisingly, it still means bad news, which means that people will continue to understand why people are getting more and more optimistic.
Conclusion: There are still many mysteries of the universe for people , but this is not a stumbling block on the way forward. When people have enough pressure, they will have enough motivation , and people will continue to work hard to draw closer The distance between people and the universe, and people's technology are also developing rapidly.