How long is the lifespan of a star? What happens when it reaches the end of its lifespan?

Everything in the universe has "life" and life is limited by time, most of the creatures on the earth are no more than a hundred years, but those planets are completely different from us, we live on the earth for 4.6 billion years, and the sun is also more than 5 billion years old, for us is the absolute "longevity star" How long is the life of a star? What happens when it reaches the end of its lifespan? Take the sun as an example, its lifespan is about 10 billion years, and when it "runs out of oil", it will disappear into the vast universe and become other matter.

We know that the planets in the universe have formed a stable galaxy due to various forces.

We are in the solar system.

is one of them, the sun, as the only star, has now reached "middle age" and will disappear in billions of years at most, but at that time he is "powerless", unable to contain other planets in the galaxy, he will also become a wandering planet wandering around, until the energy is completely consumed in the end, and then turned into dust and scattered in the universe, of course, this is billions of years later, whether human beings still exist is unknown.

The fall of stars has been staged many times in the universe, the number of stars in this huge universe is as many as tens of millions, and there are countless planets as small as the earth, on the moon, there are countless craters, these craters are the "cosmic dust" impacted, and these "cosmic dust" **, that is, those stars and planets, we can imagine that their disappearance is not as quiet as human beings, but will cause very great harm, Especially for these fragile life on Earth, tens of millions of years ago, a meteorite hit the Earth, causing the dinosaurs to almost extinct and scare us all now.

For the current solar galaxy is still relatively stable, the time required by human beings is far less than their "life", we can reach the current level of science and technology in a few hundred years, then in a few hundred years we may be able to find other planets suitable for human habitation, and then the fire of human beings will continue to continue.

10 billion years. Because when a star exists for about 10 billion years, it runs out of energy, so the lifespan of a star is about 10 billion years. When its lifespan is reached, it will happen because of the exhaustion of energy**.

The lifespan of a star has a certain relationship with its own mass, a star with a relatively small mass will become a white dwarf after death, a star with a medium mass will become a neutron star after death, and a star with a very large mass may change after death.

As a black hole, the star releases energy first, and then devours it after death.

A star may have a lifespan of 10 billion years. At the end of his life, he will collapse**. Eventually, his life will be engulfed by a cosmic black hole.

It is about tens of billions of years, and when the time is up, it will collapse towards the center, absorb the surrounding matter, and gradually form a black hole

It will be judged by the mass of the star, and the greater the mass, the shorter the life. It will be affected by quality factors, light factors, temperature, operating speed, and external factors.

It is generally about 500,000 years or 10,000 years, and its lifespan is 7 times that of the sun, which will be affected by the structure of the celestial body, and then by the mass of the celestial body, by the surrounding environment, and by the combustion rate of hydrogen and helium in the interior.

The lifespan is about 100 a year, and it will be affected by the sun, the movement of the planet, and the universe.

The life span is about 10 billion years, and the geographical location of the stars is different, so there will be a certain difference in lifespan, so these will be affected by distance and location.

The evolution of stars is mainly divided into four periods, namely juvenile, prime, recession and death. Stars are actually macroclouds at the beginning, and in the initial stage, they are obscured by dense nebulae gas and dust, which are difficult to observe, and are called Bock spheroids. After that, the central temperature of the spherical object will be particularly high, allowing the star to begin to emit light on its own, reaching a static equilibrium.

Over time, the stars enter the middle age of the stars, forming red giants and supergiants. In recessions, stars die and may become neutron stars or black holes.

During the red giant phase, the matter inside the planet no longer undergoes thermonuclear reactions, but because the pressure on the core of the outer shell increases, it will cause other shape changes. Physics connects the internal motion of stars and the production of energy, and a change in one factor causes a change in the whole. The gas is in motion, and this movement continues under the influence of gravity, and the first stars are formed.

In the middle stage, there will be a nuclear reaction inside, and after one reaction will be completed, another reaction will begin, until all the fuel is exhausted. In the final fateful stage, perseverance still collapses or erupts under the influence of gravity, which may cause some to become nebula gas, and another part to become various other celestial objects, such as white dwarfs.

The material of most stars is gaseous, and the effect of heat conduction is not very large, so the interior is very hot. In the final stage of evolution, a small feather can cause a change in gravity, shrink stars, and cause giant molecular clouds to collide constantly. At this time, it is possible to start a non-stop explosion, causing some high-speed material to be thrown out of the star.

After that, the megamolecular cloud fragments will be broken down into smaller pieces and will drift through the universe. So the life of a star actually has a program, it seems to be very short, and the evolution time is very long, much more than the lifespan of humans.

Massive stars undergo several great changes in the process of collapsing, which is what we call a supernova explosion.

In fact, not only do living beings have the ability to live, grow old, sickness and die, but the stars in the universe also have a lifespan. Although stars have an extremely long lifespan compared to humans, this does not mean that stars are eternal. Stars also have their own life cycles, and the length of a star's lifespan is determined by the magnitude of its mass.

The lifetime of a star is inversely proportional to its mass, and the greater the mass, the exponential decreasing lifespan. <>

So why do stars with more mass have shorter lifetimes? In fact, the more massive the star, the higher the internal temperature and the increased activity of the molecules. Compared with the conditions of low temperature and high temperature, the nuclear fusion region inside the star is larger, and the speed of nuclear fusion is also faster.

Take the most familiar star as the sun, for example, if a star has a mass of ten suns, then its lifetime is 10 million years, and if its mass is only twice that of the sun, then the life of the star can reach 2 trillion years. <>

And the smaller the mass, the longer the life of the star, because the lower the mass, the lower the temperature and pressure inside the star. The area of nuclear fusion inside the star is smallerFor some small persistent machines, the region of nuclear fusion is even limited to the core, except that the region is smaller, and the speed of nuclear fusion is slower than that of a star with a larger mass. Stars with less mass have slower "internal friction", less internal friction and therefore longer lifespans.

In addition, we would like to emphasize the definition of a star, which is a giant sphere composed of light-emitting plasma, mainly aggressors and trace amounts of heavier elements. The Sun we see is the closest star to Earth, and there are about 300 billion stars in the Milky Way. According to the comparison chart of the luminosity and temperature of the star, scientists divide the constancy into white dwarfs, main-sequence stars, giant stars, and supergiant stars.

Stars are constantly undergoing nuclear fusion inside to produce large amounts of energy to transport outward. Once a star is unable to perform nuclear fusion, then the star has reached the end of its life.

Mass determines the length of a star's lifespan, with the more massive the star having a shorter lifespan and the less massive the star having a longer lifespan.

The only factor that affects the lifetime of a star is mass. The more massive the star, the stronger the gravitational pull, and the stronger the outward radiation pressure required to compete with the inward gravitational pull to maintain the star's stability. And to have a higher radiation pressure, there must be a more violent nuclear fusion reaction, so the more mass of matter is consumed.

If the mass is consumed, the lifespan of the star will be shorter.

The greater the mass, the higher the core temperature, the faster the thermonuclear reaction, the faster the star burns out fuel, and the star hangs when it runs out of fuel.

As long as it is a star, whether it is large or small, it will eventually extinguish, and the more massive the star, the faster it will extinguish, because more mass means that nuclear fusion is more intense and the fuel consumption is faster. So in a few years, will there not even a single star in the universe, and the whole universe will be plunged into endless darkness and silence? The universe is far stronger than we think.

Now we have observed a lot of massive stars with a lifetime of only a few million years, and the universe is 13.8 billion years old, which means that these stars have been formed in the last few million years, because the stellar material ejected by the star before it collapses will eventually re-aggregate under the action of gravity, so as to form a new star at a certain location, we call this kind of star the second generation star, and our sun is a second generation star. Therefore, the stars in the universe are like life, and the cycle is endless.

Stars have lifespans, and although they have long and short lifespans, stars are also constantly being born. The most abundant element in the universe is hydrogen, followed by helium. With the exception of hydrogen and helium, the other elements are very rare.

Even if the star dies, most of the stellar matter that dissipates in cosmic space is still hydrogen. What's more, hydrogen is still being generated (a proton radiation from a star that captures a free electron in the universe is a hydrogen atom). And among the new stars, hydrogen must also make up the vast majority.

As a result, there is enough hydrogen in the universe to create new stars.

The life expectancy of the universe is much longer than that of stars with the smallest known mass (the smaller the mass of the star, the longer the lifespan) of the star, so the matter in the universe has the opportunity to gradually become heavier atomic nuclei through stellar nucleosynthesis, that is, the cosmic abundance of light elements such as hydrogen and helium will gradually decrease with the extension of time, so that in the foreseeable future, the condensation of matter will no longer form a main-sequence star.

But even so, the process of energy release in the universe does not end with the end of the stellar age, because gravity itself can provide a more efficient energy release. The gradual increase in the number of compact objects such as white dwarfs, neutron stars and black holes provides an efficient energy release mechanism for the accretion process of matter, and its mass-energy conversion efficiency can reach several times or even dozens of times that of the stellar mechanism. So the universe of the future is the age of gravity.

Of course, the age of gravity is not eternal. Once the matter has accumulated and collapsed to a certain extent, it no longer releases energy. There are more and more black holes and move away from each other as the universe expands, while ordinary matter becomes thinner and thinner.

If Hawking radiation exists, then the black hole will gradually evaporate, and the matter in the entire universe will gradually be energized, and then gradually expanded, cooled, and thinned.

Not necessarily, although such things have a lifespan, but with some chance, these things will also transform again and form new stars.

No, there may be new planets born in the future, and new civilizations will be born, because the universe is very mysterious.

No, because there are many elements in the universe, and these elements cause stars to be born and then grow slowly.

This statement is not true.

The lifespan of a star depends entirely on its mass. The greater the mass, the shorter the lifespan; The smaller the mass, the longer the life.

For example, the most massive blue giants usually have a lifespan of less than 100 million years, and most have only tens or even millions of years.

A red dwarf star with a mass of only a few percent of the mass of the Sun can live hundreds of billions of years, or even trillions of years.

False, stars generally have a lifespan of 500,000-1 trillion years.