Why is the sun so hot all the time? When will it not be hot?

I'll tell you the truth, you can't wait anyway.

It is estimated that there are still 6 billion years left. He will be an iron ball.

The sun is a red-hot gas planet that shines on its own. The temperature on its surface is about 6,000 degrees Celsius, and the core temperature is as high as 15 million degrees Celsius. The radius of the Sun is about 696,000 kilometers, which is about 109 times the radius of the Earth.

Its mass is tons, which is about 332,000 times that of the Earth. The average density of the Sun is grams per cubic centimeter, which is about 1 4 of the density of the Earth. The average distance between the Sun and our Earth is about 100 million kilometers.

The structure of the sun is mainly divided from the inside to the outside: the center is the thermonuclear reaction zone, the core is the radiation layer, the radiation layer is the troposphere, and the troposphere is the solar atmosphere outside the troposphere.

According to the theory of nuclear physics, the center of the sun is a thermonuclear reaction zone. The central region of the Sun occupies 1 4 of the entire radius of the Sun and is more than half of the mass of the entire Sun. This indicates that the density of matter in the central region of the Sun is very high.

Up to 160 grams per cubic centimeter. Under the attraction of the sun's own strong gravity, the central region of the sun is in a state of high density, high temperature and high pressure. It is the birthplace of the sun's immense energy.

The energy generated in the central region of the Sun is mainly transmitted in the form of radiation. Beyond the central region of the sun is the radiant layer, which extends from the radius of the sun at the top of the thermonuclear center to the radius of the sun, where the temperature, density, and pressure decrease from the inside out. In terms of volume, the radiant layer accounts for the vast majority of the total volume of the Sun.

Through thermonuclear fusion, the sun emits light by burning large amounts of hydrogen concentrated at its core, consuming an average of 6 million tons of hydrogen per second. After another 5 billion years, the Sun will deplete its hydrogen reserves, and then the nuclear region will shrink and the nuclear reaction will expand to the outside, where its temperature can reach more than 100 million degrees, leading to helium fusion.

When the sun is no longer fused, it will slowly cool down, but that will be billions or tens of billions of years away.

The heat generated travels millions of degrees Celsius inside the sun to reach the surface of the sun at a temperature of up to 6,000 degrees Celsius, and then radiates to the surface of the earth in just over 8 minutes. To put it simply, because we are very close to the sun (only about 150 million kilometers), we feel that the sun is hot.

The sun's light and heat are currently the best in the nuclear fusion of hydrogen in the interior, but the elements of the sun are limited, when the hydrogen consumes a certain percentage, the temperature of the sun is further increased, and helium will be added for nuclear fusion. When helium participates in nuclear fusion, the sun will form carbon, and the sun will radiate huge light and heat outward, so violent nuclear fusion will make the sun produce a huge expansion force, even beyond the sun's gravitational pull, so that the sun rapidly expands into a red giant. This process takes place about 5 billion years later, and if humans have not yet left the Earth, they will be swallowed by the sun, which has turned into a red giant.

The reason for solar heat is that a large number of hydrogen elements gather together, and due to the action of gravity, high temperatures are generated inside, triggering nuclear fusion, that is, hydrogen fusion into helium, nuclear fusion will release a large amount of energy, which will be volatilized through various activities of the sun. <

The reason for solar heat is that a large number of hydrogen elements gather together, and due to the action of gravity, high temperatures are generated inside, triggering nuclear fusion, that is, hydrogen fusion into helium, nuclear fusion will release a large amount of energy, which will be volatilized through various activities of the sun.

The cause of solar heat is that a large amount of hydrogen elements are gathered together, and due to the action of gravity, a high temperature is generated inside, triggering nuclear fusion, that is, hydrogen fusion into helium. Nuclear fusion releases a lot of energy, and it takes 10 million years for light to travel from the core of the sun to the surface, and about 4 billion years later, the sun will produce helium fusion, which will produce a certain collapse. <

The cause of solar heat is that a large amount of hydrogen elements are gathered together, and due to the action of gravity, a high temperature is generated inside, triggering nuclear fusion, that is, hydrogen fusion into helium. Nuclear fusion will release a lot of energy, light from the core of the sun to the surface, it takes 10 million years, about 4 billion years later, the sun will produce helium fusion, there will be a certain collapse, because the sun is not a big star, the pressure caused by gravity will not continue the fusion, the sun will collapse into a white dwarf. Reduced in size, but still massive and still able to control other celestial bodies in the solar system.