There are so many stars in the universe that it is impossible to count, but why is the universe so c

There are so many stars in the universe that it is impossible to calculate, but the reason why the universe is so cold and dark is because the average density of matter is gradually decreasing.

1.The number of stars in the universe is so large that it is difficult to calculate. We all know that a star in the universe is actually a big fireball.

Inside them, they have been engaged in intense nuclear fusion reactions and release huge amounts of light and heat into their surroundings. For example, the average stellar sun releases only about 1/2.2 billion of the energy absorbed by our Earth, which has become a world full of warmth and light.

2.Like all stars, the light and heat emitted by the sun is not due to some kind of burning object, but because of the violent reaction between the particles. We call this a nuclear reaction, especially at the closer you get to the sun.

The range and speed of movement of these particles is very fast, which makes Venus, which is close to the Sun, experience severe twists and turns, the temperature on Venus is very high, but many planets are orbiting around the Sun, and the side of the roommate close to the Sun is also facing away from the Sun, so the heating is very uneven. In addition, the distance itself is relatively far. During the operation and development of these particles, a lot of energy will slowly disappear, so there is naturally no way to keep the entire solar system in a warm environment!

3.Heat is a reaction in which substances become infected with each other when they move to a certain extent. When one substance moves very fast, it infects the other substance with heat, which also accelerates the movement speed of the other substance and generates heat.

This is infection and transmission between substances, limited to substance-to-substance. There is no material situation in the space, so there is no mutual transmission and infection.

4.The density of matter is extremely rare in the universe, with an average of only a few hydrogen atoms per cubic meter. We can see that in cosmic space, cosmic space is cold because there is not enough material to hold the heat of the stars.

There is no pattern of matter motion, space is in a very cold state, and no matter how strong the heat of the star is, its space is very cold.

It's because many stars don't have the right time to produce life, and many stars can't shine, so it's cold and dark.

There is no air in the universe, and there is no energy, so it looks cold and dark.

Many people think that the life of stars is infinite, but humans have discovered that a star that was once observed has disappeared. Hundreds of stars disappeared in 50 years, an event that caught the attention of many astronomers. So why do stars disappear in the universe?

I am also very curious about this phenomenon, because it is believed that the life of a star is very long, and its volume is also very large, even if it burns the core, it can burn for a long time, and it is impossible to disappear hundreds of stars in 50 years. But the life of stars is not infinite, and hundreds of stars have disappeared in 50 years, all of which are huge red supergiant stars that disappear when they run out of fuel. So when the fuel of the stars is burned out, then the stars will lose their life and will disappear from the universe.

Therefore, the term of any life is limited, not infinite, if this life has come to an end, we must also accept it calmly, do not forcibly retain, and in terms of human science and technology, it is also impossible to retain the life of the stars, we can only watch the stars disappear.

In fact, scientists were also very shocked when they found that the stars disappeared, and then scientists took out the old astronomical data images discovered in 1950 and found that 100 stars had disappeared strangely in this half century, and this discovery went against common sense and attracted the attention of many astronomers. So scientists understand that the life of stars is also limited, and after the burning core, the star will disappear and will not reappear. From this we can also see the laws of the universe, the universe is the same as the earth, the stars are like human beings, human beings will lose their lives and disappear on the earth, and stars will disappear into the universe.

Because stars have a lifespan, there will be a lot of changes in the long course of history, and there will also be star collisions, so it will cause the star to disappear.

This is because the fuel of a star is finite, and if the star burns up all the fuel on the planet, it will disappear.

Because stars have a lifespan and when they run out of energy, they evolve into white dwarfs, so they disappear.

We can imagine that if we lit a candle in a dark room, every corner of the room would be filled with candle flames at once. If the candle were to be taken to the dark indoor basketball court, it would be almost impossible to light up the far corners. If we move this candle to a more limb silver football field, it will be difficult for everyone in the stands to distinguish the weak color of the core candle flame of the football field.

In fact, as early as 1823, the French scientist Obos put forward the basic theory that space is pitch black, Obos emphasized that if the universe is stable and infinite, and there are many planets evenly distributed, then no matter where we look in the sky, this light will eventually reach the earth, and there will be no dark areas between the stars.

This idea of O'Bos is called the "O'Bos paradox", often called a paradox, because it is believed that everyone in the academic community at that time firmly believed that the universe was static data, and even Newton set up a static data universe model when he released the general theory of relativity, thinking that the universe is a relatively limited and boundless static data curved closed body. It was not until 1929 that the well-known scientist Hubble discovered that distant galaxies have redshifts, and the speed spacing of degeneration is positively correlated, so as to establish Hubble's law, and then verify that our universe is a dynamic universe that continues to expand, which was caused by an explosion more than 10 billion light years ago.

In this way, there is a beginning in the universe, indicating that under the limited age and red shift, we will not be able to see all the universe, and the continuous surge of the universe will make the light source more and more away from everyone, which means that the light source outside the observable range will never be where everyone is, for example, everyone lights up a lamp in a dark room, the light can light up every corner, if the room can expand infinitely, then even if there are tens of millions of lamps, it is impossible to light up the entire space, That's why it's pitch black in outer space.

Because space is a vacuum environment, there is no diffuse reflection of light, so space is still pitch black.

Because the light of the stars cannot reach space at all, space can only be pitch black.

Because there aren't too many particles in space that can reflect sunlight, we can't see light passing through space.