The process of star formation is reduced as follows: there are a large number of hydrogen atoms in the universe, and under the action of gravity, these hydrogen atoms continue to gather to form nebulae. In the process of aggregation, hydrogen atoms are accelerating and constantly being compressed at the core of the nebula. The rapid collision formed in the acceleration process makes the core temperature of the nebula rise continuously, and the concentration process makes the core pressure of the nebula rise continuously.

When the air pressure and temperature reach a certain value, the "hydrogen flash" begins to appear in the nebula core. The first "hydrogen flash" of the nebula tells the universe that a new star is about to appear in black and pink.

As the nebula shrinks under the action of gravity, the frequency of "hydrogen flash" at the core of the nebula increases. When the "hydrogen flash" continues, a star is born.

This star keeps "nuclear fusion" to maintain the high temperature state of its core. Of course, it is still "wet behind the ears", and the surrounding nebula material is still running towards it. This star is getting bigger and bigger and more attractive. With the expansion of the star's volume, its "bright region" volume also expands, which goes through a process of first fast and then slow.

In the process of the star growing, the heat generated by its violent nuclear reaction in the past month is "ejected" in the form of electromagnetic waves and "solar wind". At first, the ability of "ejection" was weak, and with the continuous increase of the star's volume, its "ejection" ability will continue to increase.

This creates a contradiction: because the star is getting bigger and bigger, its gravity is getting stronger and stronger, which makes the peripheral nebula material accelerate towards it; At the same time, these primitive hydrogen atoms are pushed by electromagnetic waves emitted from the inside out. The bigger the star, the stronger its reasoning ability.

When gravity and thrust are in balance, the star is mature.

After the birth of a star, due to the increasing thrust advantage of the star, the remaining material in the nebula will gradually drift away. This is similar to that sperm likes eggs, and other sperm have no chance. However, there is still a difference. Other nebula materials will continue to interpret the formation of the next star.

Lonely star

After the star is formed, its loneliness is far greater than that of a person in the desert of the earth. There can't be stars around it, so many stars in the universe are "bachelor" stars, even clusters that surround each other.

However, making planets is the unshirkable responsibility of stars. How did sidereal day make the planets around it?

The nuclear reaction inside a star is a fusion reaction. Fusion reaction will make the nucleus grow continuously and produce many elements. Hydrogen condenses into helium, and helium will continue to fuse to produce heavier elements. These fusion processes will continue to generate a lot of energy, thus maintaining the continued glory of the stars. However, with the continuous advancement of nuclear fusion in the center of the star, the nucleus produced is getting bigger and bigger. When iron appeared, the star was already silver-haired and white-toothed.

The production of iron is a turning point. In the periodic table of elements, the fusion of elements before iron will produce heat, but it takes a lot of heat to form iron. This is a "dangerous" reaction, and its appearance will make stars suffer from "heart disease" like human beings.

Before iron is produced, other elements such as silicon and oxygen are continuously produced, which is a "heat-generating" reaction. These substances are "exploded" by stars with heat. Within a certain distance from the stars, due to the constraint of gravity and the attraction of the central star, they converge and contract to form planets.

But the planets formed at this time are generally not too big, and there will be no iron cores like the earth. Because the heavy matter produced by the normal fusion of stars (relative to hydrogen) is still relatively slow. When will a star explode to produce heavy elements including iron (relative to hydrogen)? Of course, when iron fusion occurs inside the star. At this time, due to the iron fusion inside the star, a lot of heat is consumed, and the energy generated by the nuclear fusion of light elements (relative to iron elements) is absorbed, and the temperature inside the star begins to gradually cool down. The continuous enrichment of iron makes its fusion scale larger, so it absorbs a lot of energy inside the star. Stars contract and collapse due to a large loss of internal energy.

The intense collapse of the star makes the temperature and pressure inside the star suddenly rise, so the concentration of high temperature and high pressure accelerates the production of iron and elements heavier than iron. Because the probability of nuclear reaction of elements before iron fusion is much greater than that of iron, the heat generated inside the star suddenly increases, so the star expands rapidly, which is the supernova we observed.

The process of supernova explosion is the process of producing a large number of planetary components, similar to the filling process of winter wheat, and the formation of wheat grains will be completed in a short time.

In short, before the star collapses, the probability of owning a planet is very low, and the probability of owning an iron core planet is almost zero.

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