How are neutron stars formed, and are they all formed from neutrons?

When a star in the universe dies, its remnants are more massive than the mass of the sun (this phenomenon is also known as the Chandrasekhar limit), and the electrons are forced to merge into the nucleus, and then the electrons and protons combine to form a substance called neutrons, and neutron stars are born. Neutron stars are not entirely made up of neutrons.

When it comes to neutrons, people may feel relatively unfamiliar. But when you think of black holes, you feel a little familiar. Yes, some neutron stars are composed of neutrons, neutron stars and black holes are two special celestial bodies in the universe, known for their huge mass and gravitational pull, let's briefly introduce these two "heavyweight guests" <

The reason why the black hole is called a black hole is mainly because the gravitational pull of the black hole is extremely huge, and any object and matter that wants to get close to or close to it will be absorbed into it, and even light cannot escape his "clutches", so people are used to calling him a "black hole". According to scientific research, a black hole is a space-time region, and its outermost side is the farthest distance that light can reach from the inside of the black hole to the outside, and the boundary of this concept is scientifically called the "event horizon". It seems to be like a one-way membrane, matter can only pass through the event horizon from the outside to the inside, but matter can only be interesting and go back, can not come out of the black hole, in other words, it means that the black hole only has an inlet, no exit, only exists inside, and there is no special phenomenon of the outside.

What is a neutron star, a neutron star is in addition to a black hole, in the current known celestial bodies, the densest celestial body, at the same time he also has a very high magnetic field strength, even greater than the magnetic field strength of the earth's magnetic poles, black holes contain almost all the characteristics of neutron stars, neutron stars have an unusually strong magnetic field strength, but also have a very strong gravitational force, but in front of the black hole, his magnetic field strength and strong gravitational force in front of the black hole can only be willing to second. <

In addition to neutron stars, supernovae erupt and then undergo some reactions, which may also give birth to neutron stars in the process.

Neutron stars are stars that are in the late stages of their evolution, and they also form at the center of older stars. It's just that the stars that can form neutron stars are more massive. According to scientists' calculations, when an older star has a mass greater than the mass of ten suns, it may eventually become a neutron star, while a star with a mass of less than ten suns often changes into only one white dwarf.

Answer: A neutron star is formed by the gravitational collapse of a star evolution, which is related to mass, 1 solar mass star dies to form a white dwarf, 10 solar mass stars gravitationally collapse to form a neutron star, 30 solar mass stars gravitationally collapse to form a black hole, neutron star is the highest density of celestial bodies except black holes, the density per cubic centimeter is 10 to the 11th power, the surface temperature is 10 million degrees, and the core temperature is 6 billion degrees. After a supernova explosion, it compresses violently, and the electrons in the inner core are compressed into the nucleus, which then combine with protons to form neutrons until they are not compressed, forming a neutron star.

Neutron stars are one of the few possible endpoints of a supernova at the end of a star after a gravitational collapse of a supernova**, and is a type of star between a white dwarf and a black hole that collapses at the end of its life when a star that does not have a mass enough to form a black hole. The electrons of atoms in neutron stars are compressed into the nucleus, making the nucleus uncharged and becomes neutrons.

Neutron stars are high-density stars made up of neutrons. The predecessor of a neutron star is generally a solar mass of 10-29 times.

of stars. The tremendous pressure it exerts during the eruption collapse causes a dramatic change in its material structure. In this case, not only the outer shell of the atom is crushed, but alsoNucleusIt was also crushed.

The protons and neutrons in the nucleus are squeezed out, and the protons and electrons are squeezed together to form neutrons. Eventually, all the neutrons are crowded together to form a neutron star. Pose as a leakObviously, the density of neutron stars is comparable to that of white dwarfs composed of atomic nuclei.

It can't be compared to it either. On neutron stars, eachcubic centimetersMatter weighs 100 million tons and even reaches 1 billion tons.

Neutron star.

Neutron stars are composed of neutrons and a small number of protons and electrons, and are the densest stars except for black holes. The vast majority of pulsars are neutron stars, but neutron stars are not necessarily pulsars.

Neutron stars are one of the few possible endpoints of a supernova at the end of a star's evolution, which occurs through gravitational collapse. In the process of compressing the white dwarf imitation Li Lupei star into a neutron star, the star is subjected to severe compression, so that the electrons in its constituent matter are incorporated into protons and converted into neutrons, with a diameter of only about ten kilometers.

We all know that stars burn through nuclear fusion, which is like a furnace, except that the furnace burns charcoal, and the core of a star is extremely hot due to its own temperature. For example, the core of the sun is 15 million degrees. Thus, a star is a plasma in which the nuclei and electrons of atoms do not form atoms with temperature but bounce and play with each other, whereas nuclear fusion mainly takes place between the nuclei.

<> neutron star is the densest object outside of a black hole, with a density of 10 trillion kilograms per cubic centimeter, a surface temperature of 10 million degrees, and a core temperature of 6 billion degrees. Due to the violent compression caused by supernovae**, the electrons in the star's core are compressed into the nucleus and then combine with the protons in the nucleus to form neutrons until the neutrons are no longer compressed and all the neutrons are squeezed together to form a neutron star.

That's why neutron stars are so heavy, so dense, that even the gravitational pull of a neutron star can change the path of light, causing it to travel in a parabolic fashion. When all nuclear fusion stops, the star begins to contract because it no longer has the internal forces to resist the star's own gravitational pull. This force first strips the extranuclear electrons from orbit into a free free state, greatly compressing the space of the atom, at which point the density of the star is about 1 to 10 tons per cubic centimeter, which is less than the final evolution of a star with a mass of the sun.

The interior no longer resists its own gravitational fusion, but obtains electron pressure, and finally obtains electron pressure and gravitational equilibrium; The star stops shrinking and eventually forms the white dwarf we are familiar with. So, when you compress all the space outside of the nucleus, the density of the nucleus or neutron star becomes surprisingly high. Up to 100 million tons per cubic centimeter, or the size of a peanut on a neutron star, weighs 100 million tons.

To visualize the density and compression ratio of a neutron star, let's take the Earth as an example. It has been calculated that if the Earth were to become a white dwarf, its diameter would be only 22 meters.

Neutron stars are a type of substance called neutron stars that are produced when supernova explodes; In the event of an eruption, it will run out of nuclear energy and throw off the outer layer of material directly, so it will aggravate and cause its own weight to be relatively large.

Neutron stars are created when supernova explodes. Because neutron stars will run out of nuclear energy in the process of exploding, and will throw out the outer material, it will cause its own weight to be relatively large.

Neutron stars are produced by the energy released by the Earth, and then the corresponding energy is obtained through continuous release, so the neutron star is very heavy.

Neutron stars are created after supernovae**. The main reason is that neutron stars are particularly dense.

Every star has a lifespan, and even the Sun is no exception. At the end of a star's life, a supernova explosion occurs, after which its gravitational pull compresses the entire star until electrons are compressed into atoms to form neutrons. So far, the entire star is composed of neutrons, and its density is unimaginably large, and the mass of neutron stars can reach more than 100 million tons per cubic centimeter.

If the Earth were compressed to the density of a neutron star, the diameter of the Earth would shrink to 22 meters. When a neutron star with a radius of about 10 kilometers breaks into the solar system, what will happen to the Earth?

Neutron Star The neutron star has surpassed the mass of the sun, and when it just enters the edge of the solar system, it will compete with the sun for supremacy, such as withering and tearing each other apart, and the earth will not be spared, at which time the orbits of all the planets in the solar system will change. The earth will also be constantly hit by asteroids, and the entire earth will be caught in a meteorite impact event, and more than 60% of life will be wiped out.

Meteorite rain The surface temperature of the neutron star can reach more than 10 million degrees Celsius, while the surface temperature of the sun is only 5500 degrees Celsius.

As the neutron star gets closer and closer to the earth, the earth will be completely torn apart by gravity, turning into countless fragments to be swallowed by the neutron star, and then the earth will disappear into the vast universe.

The Earth is torn apart by neutron stars.

Neutron star is the most dense star except for the black hole, its horror can be imagined, in the current human science and technology view, if there is a neutron star into the solar system, the impact on human beings will be devastating, however, I believe that with the continuous development of science, human beings will eventually be able to get out of the solar system, to find our spare home...

A star will "condense" at a certain period of time, becoming a neutron star, it cannot be condensed forever.

Neutron stars are one of the few possible endpoints of a supernova at the end of a star's evolution, which occurs through gravitational collapse. Elements such as hydrogen, helium, and carbon in the core of stars are depleted in nuclear fusion reactions, and when they are finally converted to iron, they cannot obtain energy from nuclear fusion. The outer material that has lost the support of the thermal radiation pressure will fall rapidly towards the core due to gravitational pull, which may cause the kinetic energy of the outer shell to be converted into heat energy and explode outward to produce a supernova**, or depending on the mass of the star, the inner region of the star will be compressed into a white dwarf, a neutron star or even a black hole.

To put it more specifically, neutron stars are dense objects left behind by stars. When a star is less than 10 times the mass of the Sun, it often ends up as a white dwarf. When a star is more than 10 times the mass of the Sun, it may cause it to collapse again and become a neutron star, a star greater than 20 times the mass of the Sun may become a pulsar (a type of neutron star), a magnetar (a type of neutron star with an extremely strong magnetic field) if it is larger than 30 times, and a black hole or quark star (a quark star is a celestial body in current theory, which is between a neutron star and a black hole).

Due to their extreme mass, even neutrons are crushed into their own components). Neutron stars are very extreme celestial bodies, and they emit energy every second, and if it were turned into electricity, humans would have used electricity for a billion or even 10 billion years. Because neutron stars consume so much energy, it is possible that after the neutron star is formed, after 1 million years, it will not be able to release energy, and it will become a black dwarf that does not emit light and heat.

It is also possible that if a neutron star has a companion star, it will absorb the companion star material and become a black hole when it has enough mass. If the companion star has a small mass, the neutron star may become a quark star or remain a neutron star when the mass of the neutron star is still not the mass required for the formation of a black hole). The density of a neutron star is equal to the density of the nucleus, which is 100 million tons per cubic centimeter!

Neutrons alone decay in ten minutes, neutron stars are formed by the ultra-high pressure and ultra-high temperature of stars, protons and electrons combine to form neutrons This density is recognized because of the development of quantum theory in the last century, neutron stars are the home of stars up to eight times the mass of the sun, and no matter how heavy they are, they will inevitably form black holes!

Neutron stars are the last outcome of a star, and because of neutron degeneracy, they prevent the neutron star from continuing to collapse gravitationally.

However, if the mass of the neutron star exceeds the Tolman-Oppenheimer-Volkov limit due to some special circumstances (such as absorbing a massive star), the neutron star will collapse into a black hole, which could theoretically become another form of star with the support of internal pressure from other pathways, such as the collapse of a quark star with the support of quark degeneracy pressure. But because these theoretical quark degenerate matter are less known than neutron degenerate matter, astrophysicists generally believe that neutron stars will collapse into black holes when they exceed this limit, unless confirmed by a counterexample from actual observations.

So in general, neutron stars will not continue to evolve until their masses grow beyond the TOV limit before they collapse into black holes (but the possibility of quark stars cannot be ruled out).