Does the sun have a lifespan? How long has the sun been around?

The sun has a lifespan, according to current observations, the sun has existed for about 100 million years, in fact, the sun and the solar system.

The formation time of other large planets is about the same.

Our sun belongs to the yellow dwarf, according to the current observed model, the life span of the yellow dwarf is about 10 billion years, and now the sun has existed for 100 million years, that is, the life of the sun has more than 5 billion years left, and in these more than 5 billion years, the sun will change from a yellow dwarf to a red dwarf.

Eventually, it will become a white dwarf.

About 5 billion years ago, a bunch of nebulae in the universe continued to shrink under the action of their own gravity, the density continued to increase, and the temperature continued to rise, after tens of millions of years, the original sun was formed, after more than 4 billion years of growth, the sun has become very stable, and the current sun is the heyday of the sun. The interior of the sun is undergoing massive nuclear fusion at all times.

From hydrogen fusion to helium, 40 billion gigajoules are produced per second.

of energy, reaching only one in 2.2 billion on Earth.

Since it is hydrogen fusion, it will naturally consume hydrogen fuel, and in about 3 billion years, the hydrogen inside the sun will run out. But at this time, the temperature of the sun's inner core will also be very high, high enough to ignite helium, and then the sun will enter the era of helium fusion. At this time, the sun can still shine brightly.

And the sun will continue to expand and get bigger, and the expansion rate will be very fast, it will only take a few million years to expand to Mercury.

orbit, Mercury will be swallowed by the sun, and in a few million years, it will expand into the orbit of Venus. At this time, the earth will be surrounded by the sun's atmosphere, and our beautiful earth will have long been unrecognizable. By this time, the Sun had changed from a yellow dwarf to a red dwarf.

When the sun becomes a red dwarf, in a few hundred million years, the internal fuel will also run out, after that, the temperature of the sun will decrease, gravity will begin to prevail, and then it will begin to collapse, and finally become a white dwarf, emitting a weak white light, then it can be said that the sun's life has ended.

The sun also has a lifespan, the sun has been around for 100 million years now, and the life span of the sun is estimated to be more than 5 billion years.

The sun has a lifespan and should be able to exist for hundreds of millions of years, which is the same as the time of existence of other planets.

The evolution of stars is divided into different periods, among which the main sequence star period is the longest period of star luminescence and heat, mainly carrying out the fusion of hydrogen to helium, the lifetime of our sun's main sequence star is about 11 billion years, 4.5 billion years have passed, there are still 6.5 billion years in the future, and the red giant period after the end of the main sequence star is about 1 billion years.

The sun rises on time every day, so have you ever wondered if the sun will go out one day? If so, how long does the sun have to live?

After hundreds of years of development of science, it is now possible to answer this question, in the theory of stellar structure evolution, we can quantitatively analyze the evolution process of the life of stars, our sun belongs to the yellow dwarf, which is considered a small mass star, and such stars are very common in the universe.

The evolution of stars is divided into the main sequence stage and the red giant stage, and after the death of the star, there are different evolutionary processes according to different masses:

Main sequence star stage

Since the beginning of the violent nuclear fusion, the star has officially entered the main sequence star stage, which is mainly carried out in the fusion of hydrogen to helium, and the main sequence star stage generally occupies more than 90% of the life cycle of the star, and our sun is currently in the main sequence star period, a total of 11 billion years, and there are still 6.5 billion years in the future.

In the main-sequence phase, the speed of stellar nuclear fusion is affected by temperature and pressure, which in turn is affected by the mass of the star, so that the smaller the mass of the star, the longer the lifespan of the star, and the model calculations show that the star with less than the mass of the Sun will have a longer main-sequence star lifetime than the age of the universe (13.8 billion years).

Red Giant Stage

When the hydrogen element of the star is almost finished fusing and the internal temperature and pressure also rise to a certain level, at this time the helium element will continue to fuse to the heavier element, the release energy will increase greatly, the volume of the star will expand, and the star will enter the red giant phase.

Our sun will gradually enter the red giant period after 6 billion years, when the diameter will expand nearly 200 times and swallow the earth, while the sun's red giant period will last for hundreds of millions of years.

Death stellar phase

As the red giant continues to evolve, the star begins to enter the countdown to death, and there are several possibilities depending on the mass.

(1) Evolved into a white dwarf

For smaller red giants, the star collapses into a white dwarf after the fusion fuel is depleted, which is the future of our sun; After tens of billions or even hundreds of billions of years of cooling, white dwarfs will become black dwarfs, and the age of the universe is limited, and no black dwarfs have formed.

(2) Evolution into neutron stars

If the mass of the red giant is too large, there is a possibility of a supernova exploding and then leaving a neutron star in the inner core; Neutron stars undergo tens of billions of years of cooling before eventually forming black neutron stars.

and (3) evolution into black holes

If a supernova** leaves behind a core mass that exceeds the Oppenheimer limit, it will collapse into a black hole, or a neutron star will absorb material from another star and collapse into a black hole after exceeding the Oppenheimer limit.

The Sun is a yellow dwarf star with a typical lifespan of 10 billion years, and now the Sun has a lifespan of about 5 billion years, so there are about 5 billion years left to live.

Hundreds of millions of years, or even longer.

In fact, this question has been asked by many people, but no one knows the real result, because it is all speculation, we don't know many things, and it is good to be happy when we are alive.

The sun has 5 billion years to live, and its internal hydrogen will be completely depleted.

How long does the sun have to live?

50-6 billion years. The sun has a lifespan of 50-6 billion years. The sun is a yellow dwarf, the life span of a yellow dwarf is about 10 billion years, and the sun is about 100 million years old, so after 50-6 billion years, the hydrogen in the sun will be completely depleted, and it will begin to collapse and destroy.

The Sun is a rising star located at the center of the solar system, a sphere intertwined with a hot plasma and a magnetic field. The diameter of the Sun is about 10,000 kilometers, which is 109 times the diameter of the Earth, and the volume is about 1.3 million times that of the Earth, which is about 330,000 times the size of the Earth. The sun also lives 50-6 billion years.

The sun is a yellow dwarf, the lifespan of the yellow dwarf is about 10 billion years, and the sun is about 100 million years old, so after 50-6 billion years, the hydrogen elements inside the sun will all be depleted, and they will begin to collapse and destroy.

The Sun is a star located in the center of the imitation or solar system, a sphere intertwined with a hot plasma and a magnetic field. The diameter of the Sun is about 10,000 kilometers, which is 109 times the diameter of the Earth, and the volume is about 1.3 million times that of the Earth, which is about 330,000 times the size of the Earth.