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The universe is in a constant process of evolution and development. The universe is material, so to speak, everything is matter, matter is everything. Matter is in absolute motion, and the so-called stillness is relative, and there is no absolute stillness.
Everything is always in motion, there is change in movement, change leads to development, and the fundamental cause of development is the contradictory movement within the material itself.
As far as the universe is concerned, first of all, from the perspective of the universe as a whole, the universe is in the process of expansion, as evidenced by the Hubble redshift. From the perspective of the evolution of cosmic celestial bodies, today's theories believe that the universe was born from the big **, which is the starting point of time and space. After the big **, some basic particles are produced, and in the following time, stars, planets, cosmic dust, and so on are also produced.
For stars, the result of stellar evolution and development is to become white dwarfs, black holes, etc. So, in general, the universe is evolving and developing.
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evolutionary development; Science books.
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The universe evolved. The basis is that the universe is expanding and moving, and there is no static universe, and secondly, the uncertainty principle of quantum theory tells us that the changes in the universe are very random, which is very similar to the combination that DNA replication errors (survival of the fittest) can obtain more adaptable to the environment. So if the species is said to be evolutionary, the universe can be said to be evolutionary.
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Evolutionary development. The universe was formed by a big ** that happened about 15 billion years ago.
Before the ** happens, the matter and energy in the universe are gathered together and condensed into a very small volume, the temperature is extremely high, and the density is extremely high, and then the big ** happens.
All the galaxies, stars, planets and even life that appeared in the universe were gradually formed in this process of continuous expansion and cooling.
When the age of the universe is 10 44 seconds, the temperature is as high as 1032, and in an instant after that, that is, after 10 34 seconds, the universe suddenly "expands", just like a large balloon is suddenly blown violently, and the universe has a huge **, ** makes the universe expand 1029 times in an instant.
Its power and speed are astonishing, and its temperature drops rapidly as the cosmic sphere** expands; After the second of the big **, the temperature of the universe drops to 1011; seconds later, the temperature drops to 30 billion degrees; After a second, the temperature drops further to 3 billion degrees; By 35 minutes, the temperature had dropped to 300 million degrees. After 300,000 years, the temperature has dropped to 3,000, the universe has begun to become transparent, and chemical elements have begun to form during this period.
For 15 billion years, the universe has been expanding, the temperature has gradually decreased, and at the same time, life has been created and reproduced. It's like drawing a map at scale, condensing the 15 billion years of cosmic progress into a year, so that we get a very intuitive and interesting "cosmic calendar":
On January 10th, the big **, the universe stands out; On May 1, the vast Milky Way was born; On September 9, the solar system was born; On September 14, the Earth was formed. On September 24, primitive life appeared on Earth; On November 12, the greenery broke through the ground; On December 26, more advanced mammals appeared. At 0:22:30 on December 31, primitive humans stood on the earth; In 23 minutes and 46 seconds, Peking Man created fire; In 23 minutes and 59 seconds, Chinese history continued to the Spring and Autumn ......Song dynasty; In 24 points, the world has entered the modern society that has continued to this day.
It can be seen that human history is only an extremely short moment in the cosmic years.
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Development because time moves forward.
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This problem arises when humans first look up at the sky and see a vast sky with bright stars. About the origin of the universe. Humanity is constantly exploring, and there are several hypotheses.
The first hypothesis is cosmic eternalism. Suppose that time and space in the universe are infinite and that the universe is infinite and will exist forever. That is, the universe is infinite in space, and there is no eternal banner in the universe.
The universe as a whole is stable, and timely changes are only partial changes. The second assumption is: According to the theory of cosmic stratification, the structure of the universe is layered, the stars are layered, and the stars come together to form galaxies.
Galaxy Group. It is a hierarchical system in which some galaxy clusters are rearranged into supergalaxies. Reach a higher level.
The third hypothesis is the big ** theory, which has been accepted by many scientists so far.
It began with an astonishing discovery by astronomer Hubble published in 1929 that shocked the scientific community. This finding leads to broader conclusions. All galaxies outside of our galaxy are leaving us, and the universe is expanding at a very rapid rate.
This discovery has led some astronomers to believe that the expansion of the universe may be the starting point because it is expanding. Belgian physicist. Georges Le Master believed that the universe was used by primitive atoms and was the predecessor of "The Great **".
The Russian-American astronomer Gamov and the Soviet physicist Jan Alexander Liedman accepted and developed Le Master's ideas, and in 1948 formally put forward the grand ** theory of the origin of the universe. Scientists supporting this theory believe that it happened about 200 million years ago.
The celestial bodies we see today form very dense circles with temperatures of up to 10 billion degrees. Stars and galaxies didn't exist at the time, but the first fireballs didn't appear until after an unknown reason. Once the big ** occurs, the substances that make up the fireball are ejected in all directions, gradually cooling, and the density begins to decrease.
**After about 10,000 years, the nuclei of heavy elements were formed, and the atoms of hydrogen and helium were formed at the same time.
Matter scattered in space condenses into nebulae and stars in galaxies. During the development of nebulae, most of the gas is converted into new celestial bodies. The gravitational pull of stars makes certain matter interstellar mediums.
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Only by understanding the universe can we human beings survive in the universe for a long time.
Although you don't need all the world's space agencies, then you can save yourself hundreds of billions. With this money, it is possible to make a good life for the poor. But do humans still have to spend a lot of money on research?
You know, a probe or a spaceship, once it's launched, then people won't see it again.
The reason why a lot of money is spent on experiments, research, exploration, etc., is to prepare for the future direction of mankind. You must know that the earth will never be a shelter for human beings, the sun also has a lifespan, and when the sun's life is approaching, there will be no life on our earth.
All life in the universe has one thing in common, and that is the desire to survive. In order for us to survive for a long time, we must understand the universe and then start researching spaceships to prepare for the survival of mankind in the future.
It's like China, launching so many exploration satellites, manned spacecraft. A lot of money was invested, and what you got was very different from what you invested. The spaceship flies up, and the people come down. It can also be said that the astronaut took the money, flew into space, and then returned to Earth empty-handed.
The famous British physicist, Stephen Hawking, said:
2050 Human migration to Mars.
2100 Humans enter outer space and a new human race emerges.
In 2210, the Earth faces destruction.
2600 The Earth turns into a blazing "fireball".
Mankind must study the spacecraft that flies long distances as soon as possible, otherwise it will not be possible to achieve the long-term survival of mankind.
In short, the first step to surviving in the universe for a long time is to understand the universe.
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There are two most important arguments:
1) Cosmic background radiation (cosmic egg).
2) Redshift of distant galaxies.
The big ** theory is mainly supported by these two points.
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Nowadays, most people agree with the "** theory", but it cannot explain what the universe was like before the "big **". There is also the "inflation theory", which can explain what it was like before the "big **". The specific content is not clear, search for it on the Internet!
Personally, I am more in favor of the "inflation theory"!
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