The earth was formed 4.5 billion years ago, why hasn t the center of the earth cooled down until now

Experts have found that at the beginning of the earth's production, the temperature of the whole earth is very high, but as time goes by, the heat continues to be lost, and the overall temperature of the earth is actually decreasing. Today, the average temperature of the Earth's surface is around 14 degrees Celsius, while the temperature of the Earth's core is still above 5,000 degrees Celsius. 4.5 billion light-years have passed, and the temperature of the earth's surface has already dropped significantly, why is the earth's core, like a perpetual motion generator, still a liquid key?

This may be a problem that must be traced back much further. About 5 billion light years ago, the Sun collapsed from its star orbit, and the rest of the star orbit quickly and gradually rotated around what sunlight centered, and other "leftovers" formed the planets 100 million years later. Some of these planets are solid, some are vapors, and the solid planets are all hot stars covered with lava in the early stage of their establishment, but the temperature of the planets will gradually decrease over time.

But the Earth's core is one exception. Earth's neighbor Spark also had a liquid key, but because the mass was too small, the spark core was finally extinguished. The Earth, on the other hand, acquires very high pressure and relative density, allowing it to maintain a relatively high temperature.

The high temperature of the Earth's internal structure causes the nuclear decay of radioactive elements, which can also heat the Earth's core for billions of years.

There is a liquid key, which is important for the survival of the earth. The liquid key constitutes the earth's electromagnetic field in the earth's rotation, and the magnetic field is the basic condition for the maintenance of the earth's atmosphere. The earth's atmosphere also plays a role in heat insulation and heat preservation, so that the earth's heat can be stored under the premise of continuous loss, and the energy can be stored, so that the earth's heat loss can complete a stable balance.

This is the main reason why the earth needs temperature for life reproduction.

The Earth's core rotates faster than the rest of the Earth (the inner core is solid, the outer core is liquid, and it is not linked), and high-density friction generates heat.

The reason why the heat conduction in the Earth's interior is so slow is largely due to the fact that the rock layer is so thick that it acts as a very good heat preservation, isolating the upward transfer of heat energy from the Earth's interior. And further analysis shows that the middle layer also plays a role in isolation. For these reasons, it's hard for the earth to cool down completely.

The center of the earth has not cooled down, indicating that the heat dissipation is not as fast as heat production, or even much slower, basically in 1 billion years, the temperature drops by about 100 degrees, because the thermal conductivity of silicate is too poor, and the earth's crust is too thick. The heat dissipation is very.

The earth has been formed for 4.5 billion years, but the center of the earth has not cooled yet, and there is a reason for this. According to scientists, our solar system was formed about 4.6 billion years ago, and the absolute core of the Sun was born slightly earlier than the other planets in the system. The various celestial bodies in the solar system, if traced back to the source, scientists analyze that this region is shrouded in countless nebulae, these nebulae should be the previous massive stars in the late life, released by supernovae**, under the influence of gravitational disturbances that occurred over a long period of time, the slow accumulation of gas, dust and material collision and gravitational collapse combined, making the concentrated core heavier and hotter.

The largest core, after attracting a large amount of interstellar matter, reaches the temperature of hydrogen fusion and gradually evolves into the sun. After the formation of the Sun, due to the huge outward radiation pressure generated by the internal nuclear fusion, which to a certain extent prevented the further accumulation of material from the surrounding nebulae, these nebulae moved away from the orbit of the Sun and began to orbit around the core of the Sun under the action of the Sun's gravity and the conservation of angular momentum of the aggregated matter, and in the process of rotation, due to the higher density of matter in the initial stage.

The probability of colliding with each other is very high, and at the same time, after absorbing the rest of the marginal material, the Sun also self-aggregates due to the interaction between gravitational forces, so that several small cores are gradually formed at different distances from the Sun, starting from the cores, slowly gathering in the form of free nebulae, and forming different planets or moons around them.

Taking the Earth as an example, in the process of its formation, due to the accumulation of friction and collision of matter, as well as the gravitational potential energy of the nebula on the Earth, the original core collapsed in this process, so the internal temperature also continued to rise, but because the Sun absorbed the most nebulae, it was in the solar system. So, like other planets, Earth's core is getting hotter and hotter in the initial stages, but it can never reach the level of nuclear fusion. As a result, the overall temperature of all planets shows a slow downward trend after the formation of planets, and Earth is no exception.