The sun is hot at 15 million degrees Celsius, which can melt any metal on earth, why hasn't the sun itself melted?

The sun, the blazing fire that shines in the universe, has always been the object of human curiosity and exploration. Even though it is only a star a million times larger than Earth, its interior temperature reaches a staggering 15 million degrees Celsius, enough for any metal on Earth to vaporize instantly. So, why is this "solar furnace" with such a high temperature not melting itself?

First, we must recognize that the interior of the Sun is not solid, liquid or gaseous as we know it, but in the form of plasma. When a gas is subjected to extremely high temperatures and pressures, its atoms are ionized, forming a large number of charged particles, which are called plasmas. Inside the Sun, due to unimaginable temperature and pressure conditions, hydrogen atoms undergo a "proton chain reaction" of nuclear fusion, releasing the equivalent of 300 million nuclear power plants per second.

This fusion reaction is the sun's main source of energy and the fundamental reason why it continues to shine and shine. But even at such high temperatures, the plasma is firmly trapped inside and is not "melted" due to the strong gravitational field of the sun. This is because the gravitational field and the forces of the plasma cancel each other out, creating a delicate balance that keeps the internal structure of the Sun stable.

Not only that, but the outer atmosphere of the sun also plays a key role. This outer atmosphere, known as the "plasma layer", can reach temperatures of hundreds of thousands to millions of degrees Celsius, far exceeding the Earth's surface temperatures. This high-temperature environment is the ideal condition for plasma to form. The plasma is constantly flowing, like a never-ending "heat engine", providing a constant stream of energy to the sun.

With a strong gravitational field and a "double shield" of the high-temperature plasma layer, the nuclear reaction zone inside the sun becomes a never-ending "energy factory". Here, 60 billion tons of hydrogen are converted into helium every second, releasing unimaginable amounts of energy. This energy travels outward in the form of photons, neutrinos and other particles, and eventually gushes out on the surface of the sun, bringing a steady stream of light and heat to the earth.

If the inside of the sun is an "energy factory" that never rests, then the light and heat it transmits to the earth are the "power source" that sustains all life on the earth. Without the sun, there would be no natural phenomena such as the water cycle and wind power generation on the earth, let alone plant photosynthesis, animal survival and other life activities. It can be said that the sun is the foundation that supports the earth's ecosystem.

Amazingly, despite the fact that the temperature and pressure inside the sun are beyond the limits of human cognition, it is able to carry out nuclear fusion reactions in a steady manner, releasing energy continuously. In contrast, even humanity's most advanced nuclear fusion technology cannot be compared to the "energy factory" inside the sun. This really makes people sigh: the power of nature is so amazing and incredible!

Overall, the internal structure and energy mechanism of the Sun as a star is truly breathtaking. The powerful gravity field, the high-temperature plasma layer, and the never-ending "energy factory" in the nuclear reaction zone all together form this shining "solar sphere". It not only brings light and heat to the earth, but is also the foundation of the earth's ecosystem. I can't help but sigh from the bottom of my heart: Sun, you are amazing!

The sun is a dazzling star, not only has an astonishing internal temperature, but even its surface is full of flames. The surface of the Sun, the photosphere we see, is as hot as 5,800 degrees Celsius, enough to vaporize any Earth's metal instantly. But even so, the surface of the Sun is still much cooler than the 15 million degrees Celsius temperature inside.

This temperature difference is actually an important feature of the inner and outer structure of the sun. In the inner core of the sun, violent nuclear fusion reactions are constantly taking place, and unimaginable energy is constantly released. This energy travels outward in various forms, eventually gushing out in the photosphere and becoming the "sunlight" we see.

In the process, the temperature gradually decreases significantly from the inside out. Extreme temperature conditions cause energy to radiate outward in the form of high-energy particles such as photons and neutrinos. As these particles propagate outward, they interact with the surrounding plasma and gradually transport energy to the photosphere.

This gradual cooling process is like a huge "radiative heat transfer" process. The high-temperature radiation energy inside is continuously absorbed, scattered, and re-radiated in the process of propagating outward, and finally forms the surface of the star we observe in the photosphere. This explains why, while so hot, the surface of the Sun is still much cooler than it is inside.

However, we must note that even 5,800 degrees Celsius on the surface of the sun is already an unimaginably high temperature. That's enough temperature for any metal on Earth to melt at once. In contrast, the maximum temperature on the earth's surface is only about 5,000 degrees Celsius, which shows how hot the sun really is.

If it weren't for the "double barrier" of the sun's powerful gravitational field and the outer plasma layer, I am afraid that the entire interior of the sun would have burned out long ago. Together, these two layers of "protection" hold the inner structure of the sun together, allowing the violent reaction of the core to finally be visible to our eyes.

It can be said that it is precisely because of this ingenious connection between the inner and outer temperatures of the sun that this star has been able to operate stably for billions of years and provide a steady stream of energy for life on Earth. This undoubtedly confirms the wonder of nature once again, and makes people can't help but feel more awe of this distant star.

Disclaimer: The process and pictures described in the article are from the Internet, and this article aims to advocate positive social energy and no vulgar and other bad guidance. If it involves copyright or character infringement issues, please contact us in time, and we will delete the content as soon as possible! If there is any doubt about the incident, it will be deleted or changed immediately after contact.