Why the sun and its fire will not be extinguished in the universe

The sun is not a fireball, but nuclear fusion, which burns hydrogen as well as the isotope of hydrogen, deuterium, tritium, etc. And the life span of the sun is about 10 billion years, not 5 billion years, there are still 5 billion years left, and after 4.5 billion years, when the fuel reaction is about the same, it will become a red giant. The last contraction is called a white dwarf.

The sun is not something that burns like burning wood, its energy is nuclear fusion, which is an atomic physical reaction, which compresses the hydrogen nucleus under the action of its own mass and gravity, triggers fusion to form helium, and then fuses to heavier elements after hydrogen fusion, which can be fused into iron, and after the fusion of all elements is completed, some stars will explode into supernovae, and some will become black holes. These processes have nothing to do with ordinary combustion processes...

Not fire. The reason why it doesn't feel like it's going to "go out". It's because our life span is too short.

Because the Sun is a star, the Sun's lifespan is generally 5 billion years.

That's not fire, it's nothing to do with fire.

Yes, the sun also has a lifespan, and will become a red giant in about 5 billion years.

The Sun is a star located at the center of the solar system, and it is almost an ideal sphere intertwined with hot plasma and magnetic fields. The diameter of the Sun is about 1,392,000 (kilometers, equivalent to 109 times the diameter of the Earth; It is about 1.3 million times the size of the Earth; Its mass is about 2 10 kilograms (330,000 times that of the Earth).

In terms of chemical composition, about three-quarters of the mass of the Sun is now hydrogen, and almost all of the rest is helium, including oxygen, carbon, neon, iron, and other heavy elements with less than 2% of the mass, which uses nuclear fusion to release light and heat into space.

The trajectory of the Sun's activity.

From the inside to the outside, the sun is divided into the solar nuclear reaction zone, the solar troposphere, and the solar atmosphere. One in 2.2 billion of this energy radiates to the Earth, becoming the main source of light and heat on Earth. Activity phenomena on the surface of the Sun and in the atmosphere can greatly enhance the solar wind, resulting in many geophysical phenomena such as increased auroras, atmospheric ionosphere and geomagnetic changes.

The enhancement of solar activity and solar wind will also seriously interfere with the normal operation of radio communications and space equipment on the earth, cause damage to the sophisticated electronic instruments on the satellite, cause chaos in the ground communication network and power control network, and may even pose a threat to the lives of astronauts in the space shuttle and space station. It is increasingly important to monitor solar activity and the intensity of the solar wind and to make timely space weather forecasts.

The sun has been burning because of nuclear fusion reactions.

The sun contains a large number of hydrogen atoms, usually a neutral hydrogen atom contains a positively charged proton and a negatively charged electron, and the electrons orbit around the protons. When this atom encounters another hydrogen atom, their respective outer electrons repel each other. But the sun's core is so hot and high-pressure that the atoms scurry around with a lot of kinetic energy, overcoming the forces that bind them together, and finally the electrons and protons separate.

In the interior of the sun, four hydrogen protons fuse together to form a helium atom. During this time, a small portion of the mass of the four protons is lost. Due to the conservation of mass and energy, these masses are converted into enormous amounts of energy, so that the sun radiates up to 10 26 watts.

Based on the current electricity consumption of human beings, the energy produced by the sun per second is far greater than the electricity used by the entire world for hundreds of thousands of centuries.

Stars have a finite lifespan, and the Sun, as an intermediate-mass star, has a lifespan of about 10 billion years, and the Sun is now more than 5 billion years old. In this way, the life span of the sun is at least 4.5 billion years, even if the main sequence stage of the sun is calculated, it is not less than 3 billion years, it seems that there is still plenty of time left for human beings, billions of years is enough time for us to develop into an interstellar civilization, and even if the earth is swallowed up by the sun, we can also move to other habitable planets in the universe.

However, the reality is not so rosy, because there may be only 100 million years left for mankind. Why? It's true that there are billions of years before the sun flashes and expands dramatically, but that doesn't mean the sun won't change before then.

The sun collapses in about 50 to 6 billion years.

The sun has reached middle age in the evolution stage of its main order, and its main change is nuclear fusion, over time, the hydrogen element inside the sun will be almost completely depleted, the sun will collapse, the temperature will rise, and the hydrogen element inside the sun will be almost completely depleted.

The sun is going to destroy. After a long and meticulous study, astronomers have confirmed that the sun will eventually go out, but will wait until 5 billion years from now.

After 4.5 billion years, the Sun will expand into a red giant, Mercury, Venus, and the Earth will evaporate. After hundreds of millions of years, it becomes a very dense white dwarf, the size of the Earth. It will last for hundreds of millions of years and turn into a black dwarf. This is the end of the sun.

Why did the sun burn for 4.6 billion years and never go out?

1. Most of the materials that make up the sun are ordinary gases, of which hydrogen accounts for about 27%, helium accounts for about 27%, and other elements account for 2% and hydrogen is the main one;

2. The combustion of the solar family is actually hydrogen fusing into helium, so it consumes hydrogen. When the hydrogen is consumed, he goes out....

3. The sun can be divided into nuclear reaction zone, radiation zone and convection zone from the center to the outside, and the solar atmosphere. The atmosphere of the Sun, like the Earth's atmosphere, can be divided into various layers according to different heights and different properties, namely the photosphere, the chromosphere and the corona. The surface of the sun, which we usually see, is the lowest layer of the solar atmosphere, with a temperature of about 6,000.

It is opaque, so we can't see directly the inner structure of the sun. However, astronomers have built models of the Sun's internal structure and physical state based on physical theories and the study of various phenomena on the surface of the Sun. This model has also been confirmed by studies of other stars, and it is credible, at least in the big picture.

The Sun has reached middle age in its main-sequence phase, during which the stellar nucleosynthesis reactions that occur inside its core fuse hydrogen into helium. At the core of the Sun, the Void Liquid converts more than 4 million tons of matter into energy every second, generating neutrinos and solar radiation. At this rate, the Sun has so far converted about 100 Earth-mass matter into energy.

The time when the Sun is the main-sequence star lasts about 10 billion years.

The mass of the Sun is not enough to explode the difference for a supernova. In 5,06 billion years, when the hydrogen in the Sun is depleted, and the core is dominated by helium atoms, the Sun will turn into a red giant, and when the hydrogen in its core is depleted, causing the core to shrink and the temperature to rise, the outer layers of the Sun will expand. When its core temperature rises to.

k, the fusion of helium will occur to produce carbon, thus entering the asymptotic giant branch, and when all the helium in the sun is also converted to carbon, the sun will no longer shine and become a death star (black

dwarf）。

The ultimate fate of the planet is not yet known. When the Sun becomes a red giant, its radius can exceed 1 AU, which is 260 times the current radius of the Earth beyond the Earth's current orbit. However, by then, as an asymptotic giant branch star, the Sun will lose about 30% of its current mass due to stellar winds, and the planet's orbit will be extrapolated.

For that reason alone, the Earth may be spared from being swallowed by the sun. However, new research suggests that the Earth will still be swallowed by the sun due to the effects of tidal action. Even if the Earth could escape the fate of being melted by the Sun, the water on Earth would evaporate and the atmosphere would escape.

In fact, even when the Sun is still a main-sequence star, it gradually becomes brighter and the surface temperature rises slowly. The rise in the sun's temperature will cause the Earth's surface to rise in 900 million years, making life as we know it impossible to survive. In another 1 billion years, the water on the Earth's surface will disappear completely.

After the red giant phase, the intense pulsations generated by the heat throw off the Sun's outer shell to form a planetary nebula. All that remains after losing its shell is the extremely hot stellar core, which will become a white dwarf, slowly cooling and dimming over a long period of time. This is typical of the evolution of low- and medium-mass stars [4].