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The universe is a mysterious space, from the Big Bang theory to the cosmic microwave background radiation, scientists have revealed the infinite expansion and emptiness of the universe through research.
After the Big Bang, the matter in the universe began to spread out in all directions, making the stars farther and farther apart, revealing the vastness and unknown mysteries of the universe.
So how empty is the universe?
What are the mysteries of the universe?
1. The reason for the emptiness of the universe.
It wasn't until 1929 that the American astronomer Edwin Hubble discovered the relationship between the speed and distance of galaxies, which aroused great interest among scientists, thus revealing the fact that the universe is constantly expanding.
The Big Bang theory reveals that the universe is in a constant expansion motion, which is an infinite expansion of the universe observed on a time scale of tens of billions of years, which can give people a better understanding of the evolution of the universe.
The Big Bang theory reveals that the reason for the expansion of the universe is that the beginning of the universe is very hot, the energy of matter is very concentrated, and because the gravitational force between matter is very large, the space between them is very confined to each other, forming a very compact space.
All matter and energy are concentrated in one point, showing an extremely high density, and after an instant explosion, matter and energy are dispersed from this point to all sides, forming a huge space, forming a phenomenon that the distance between the stars is getting farther and farther, that is, the universe begins to expand infinitely.
The Big Bang theory has given people a better understanding of the origin of the universe and laid a solid foundation for exploring the mysteries of the universe.
And in the earliest stage of the Big Bang, the space was very hot, the temperature was very high, and under the conditions of extreme density, photons and matter collided to show an extremely high energy state, thus forming a special radiation phenomenon, that is, cosmic microwave background radiation.
However, with the infinite expansion of the universe, the temperature and energy are diluted, and the photons are gradually absorbed by the electrons, and finally form a transparent matter, thus ending the cosmic microwave background radiation, which is an important stage of the development process.
After the cosmic microwave background radiation was discovered, it was considered to be the legacy radiation of the Big Bang, which has been over for 13.82 billion years, but the cosmic microwave radiation has not disappeared over time, but has always existed, which provides strong evidence for the theory of the Big Bang.
At the same time, the observed abundance of hydrogen and helium in the universe has a very important relationship with the Big Bang, which has become the key point of the Big Bang theory and provides a very important basis for scientists' research.
2. The embodiment of the emptiness of the universe.
After the Big Bang, matter and energy spread in all directions, thus forming the framework of the universe, and these matter and energy continued to gather to form various stars, such as stars and star clusters.
In the universe, the distances between bodies are very far, and many of them are relatively close to each other, and some stars are very far apart, and the stars in the Milky Way are also unevenly distributed.
In some places, the distance between the stars is very close, while in other places the distance between the stars is very far, and you can see that the distribution of stars in the Milky Way is very uneven.
In the Milky Way, the distribution of stars is highly concentrated, the closer you are to the center of the galaxy, the denser the stars become, and the distance between the stars becomes farther and farther away as you move to the outer edge.
In the central region of the galactic core, there are an average of 12 stars in space per cubic light-year, and an average of one star in space every 167 cubic light-years.
On average, only one star appears every 500 cubic light-years on average at the outer reaches of the Milky Way, and beyond the Milky Way, the distance between stars becomes even more distant.
And in the Milky Way, there will also be a cluster distribution between stars, that is, there are several stars near a star, and these clusters have an impact on the stability and formation of stars.
In the Milky Way, there are many large and small star clusters, nebulae, etc., which are left in the process of star formation, and are also an important source for star formation companion stars and planets.
At the same time, there are cosmic holes in the Milky Way, these regions with a relatively small average density, the distance between stars is even farther away, and the regions without stars will form cosmic holes, which are very sparse regions of the universe.
3. The emptiness of the universe from the distance between the stars.
It can also be seen from the stellar density of the galactic core region that the stellar density is very large, and the distance between the stars is relatively close, with an average of 12 stars in space per cubic light-year.
It is characterized by the fact that the stars are very close to each other, showing a very dense state, and at the same time, the gravitational force between the stars is very large, so the orbits between them are very chaotic.
Usually in this kind of situation where the orbits between stars are very chaotic, the stars will collide with each other, and even show a state of multi-body collision, so that the original stars will be combined into new stars, or star clusters, star clusters, etc. will be formed.
As a result, the distances between stars in these regions will also change, and various star clusters, nebulae, etc. will also be formed.
The galactic core region is the densest place in the Milky Way, and the stars are very close to each other, showing a dense state, which also means that collisions between stars are easy to occur.
In the vicinity of the galactic region, there are many large and small star clusters, and the distance between the star clusters is very close, so there will also be collisions between stars in these places, so there is not much difference in the formation time between large and small star clusters.
These clusters, star clusters, and even star clusters collide to form larger star clusters, which in turn form larger clusters over longer time periods.
At the same time, there are many stars in the Milky Way galaxy that will show a special distribution during the movement cycle of the planets, which also determines the formation of planets and the possibility of life being born in the universe.
epilogue
The universe is actually in a state of continuous expansion, and the distance between the stars is getting farther and farther apart, which is also due to the continuous diffusion and formation of material energy in the surroundings after the Big Bang.
The emptiness of the universe also allows human beings to see the infinite beauty of the universe, and behind this infinite beauty, there are also more unknown mysteries, such as dark matter, dark energy, etc.
These are still the focus of scientists' exploration, and human cognition and understanding of the universe are limited by the level of science and technology and observation methods, with the continuous progress of science and technology, there may be more new discoveries about the universe.
The infinite expansion and emptiness of the universe have also triggered mankind's profound thinking and exploration of life, the origin of the universe, and the meaning of existence.