How many more years can the sun exist, and how many years do the sun have left in its lifespan

It is theoretically estimated that the sun will "live" for another 50 to 10 billion years. Although this estimate is too general, it is not too broad for life on Earth. Because in fact, life on Earth did not die until the day the sun disappeared, they died at least billions of years before the sun.

The history of human development is only one or two million years, which is too small and too small compared to the number of 100 million. Human beings, like other living beings, are products of nature and must be bound by nature. It is impossible for a man to overcome heaven.

The existence of the earth is a process, and the existence of all living things is also a process. No matter how smart human beings are, they are no exception. Even if humans do escape from the solar system before the sun dies, there are still constraints on the galaxy and the universe.

There is life and death, and there is no eternal thing. This is the basic law of the material world.

The sun continuously radiates energy into space in the form of electromagnetic waves. This energy is released by the fusion of four hydrogen nuclei into a helium nucleus under high temperature and high pressure. We know that the atomic weight of a hydrogen nucleus is, the atomic weight of a helium nucleus is, and the mass of 4 hydrogen nuclei should be.

When 4 hydrogen nuclei fuse into 1 helium nucleus, a unit of mass is lost, of which, 1 gram of hydrogen nuclei is fused into a helium nucleus. This means that solar energy is produced at the cost of consuming mass, and this mass is converted into solar radiation and no longer belongs to the sun. The sun loses about 4 million tons of mass per second, which is simply too small for a huge solar mass.

In the 5 billion years since the birth of the sun, the sun has consumed only mass, and even in another 5 billion years, it will only consume the mass of the sun. But the question is, no matter how massive the sun is, it is still limited, and how long can the sun last for life? What is the impact on the planet?

The life of the sun begins from the nebula, and finally until the red giant, the white dwarf, becomes the dead remains of the sun, this process will take about 10 billion years, that is to say, another 5 billion years will be the death period of the sun, and the earth we live in will be swallowed by the sun when it becomes an expanding red giant. If we humans could survive to that time, we would have to fly to other planets to live.

What is happening inside the sun is nuclear fusion.

The primordial heat of the sun is due to its internal pressure. According to the principle of the law of gravitation, the greater the mass of an object, the greater its gravitational pull. In the early years, when the sun snowballed, as the mass increased, the gravitational pull became stronger, the more material it attracted around it, the more mass was increased, and so on, the mass of the sun became larger and larger.

At the same time, the greater the mass, the greater the internal pressure, so that the temperature continues to rise. Thermonuclear fusion occurs under sufficient pressure (called critical pressure) and a suitable ignition temperature. As the mass of the primordial sun continues to increase, the internal pressure and temperature rise, and after the conditions for thermonuclear reactions are met, the sun begins to shine and become a star.

Generally speaking, for a gas planet to become a star, it must have a certain mass, so that the pressure and temperature inside it can meet the conditions for a thermonuclear reaction, and this mass is called critical mass. A typical example is Jupiter, the largest gaseous planet in our solar system, which is also a gaseous planet composed of hydrogen, but because its mass is less than the critical mass, the internal pressure and temperature cannot meet the conditions for thermonuclear fusion, so it can only be a gaseous planet. However, it is a potential sun, and some scientists speculate that after the destruction of the sun in the future, Jupiter, which is not constrained by the sun, will attract the surrounding planets to form a small solar system by virtue of its position as the leader of the solar system, and at the same time continue to absorb the surrounding matter to increase its mass, and after reaching a critical mass, it will shine and become another sun, but that will be 5 billion years later.

Between 5 billion and 10 billion years, you don't have to worry, the sun won't go out in your lifetime.

The current sun is middle-aged when the sun is in its prime, and it is estimated that it will be 5 billion years old.

You'll see it in your lifetime.

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.

Scientists now calculate that the sun has about 5 billion years left to live. So far, the sun has passed half of its lifespan, and in about 1 billion years, the sun may evolve into a red giant, when the sun is too big, the earth will lack water, and there may be no life on the earth.

In order to calculate how much life the sun has left, scientists need to first estimate the total life of the sun, using physical formulas to calculate that the sun has a lifetime of about 10.4 billion years.

It is often said that the total life of the sun is 10 billion years, because the actual rate of nuclear fusion reaction will be faster and faster.