When will the Sun become a white dwarf? How big will the diameter become?

In about 6-7 billion years, the Sun will become a white dwarf.

The diameter is about 180 km.

The Sun entered the main-sequence phase about 4.5 billion years ago, and for a star as large as the Sun, the main-sequence phase lasts about 10 billion years, and then passes by the red giant star for a short time.

stage to the white dwarf.

Only stars with masses less than times the mass of the Sun will evolve into white dwarfs, and more than this number will evolve into neutron stars.

The evolution of the Sun into a white dwarf is still needed.

5. 6 billion years old, about the same diameter as the current Earth.

The Sun is one of the most common celestial bodies in our lives, but, have you ever wondered if the Sun is a white dwarf? This question is not so easy, so let's explore it in depth.

What is a white dwarf?

A white dwarf is the remains of a stellar that is extremely dense and has a low surface temperature. In the universe, white dwarfs are a very common type of star, especially in the Milky Way.

Does the Sun fit the characteristics of a white dwarf?

Not exactly. Although the Sun is a star, it is not dense enough to make it a white dwarf. The density of white dwarfs is usually very high, usually 1 ton per cubic centimeter.

The average density of the Sun is only cubic centimeters per gram, which is much lower than the density of white dwarfs.

The evolution of the Sun.

The Sun's trajectory is similar to that of a white dwarf. The trajectory of a star depends on mass, and the mass of the Sun is about the average of the masses of other stars in the solar system. From the perspective of the Sun, it will gradually brighten over the next few billion years, eventually becoming a red giant.

Then, it will lose most of its mass and become a white dwarf. At this stage, its density will be very high.

So what type of star is the Sun?

From the point of view of stellar classification, the Sun belongs to the G-type star. The mass of such stars ranges to times the mass of the Sun. These stars are very common in the universe, and as such, the Sun is not a very special celestial body.

Conclusion. Overall, the Sun is not a white dwarf, although it has a similar trajectory to that of a white dwarf. From the point of view of stellar classification, the Sun is a g-type star with less mass and less density.

Therefore, although the Sun is one of the most important celestial bodies in our daily lives, it is not the most special star in the universe.

Everything has a beginning and an end. The Sun, which is now in middle age, has a theoretical lifespan of 50 to 7 billion years, and when its main-sequence phase ends, it will become a white dwarf. Now, everything on Earth and in the solar system depends on the sun, so what happens to the planetary brothers in the solar system when the sun goes down without the warmth and protection of Big Brother?

<>Let's start with Earth, it doesn't have to worry about going to **, right? Because at the end of the Sun's life, the Earth will move into the embrace of the Sun, and when the Sun becomes a red giant, its volume will increase by at least a billion times, eventually swallowing the Earth's orbit.

Then the result is obvious, in the orbit of the sun, the earth will be swallowed into the belly, that is to say, then the earth will be buried in the great flames of the sun, become part of the sun, everything on the earth will melt, and since the earth is a rocky planet, the density is higher than the average density of the sun. It may even end up in the Sun's thermonuclear reaction zone, where much of Earth's material will decompose at a high modulus temperature, and some lighter elements, such as hydrogen and helium, below carbon, will join the Sun's nuclear fusion.

100 million years after the start of the apocalypse, the red giant's production core has finally run out of nuclear fuel and collapsed into a compact object, the white dwarf. This is the remains of a dead star that glows white because of the heat generated by its contraction. White dwarfs are three-quarters the mass of the original Sun and only the size of the Earth.

If Earth were still around, the newly formed white dwarfs would sparkle like diamonds in the sky, and the light on Earth would be the same as at dusk, but no longer with the heat of the sun, a cold, abandoned digital world by potato cherry blossoms. Over the next 30 billion years or so, the Sun will slowly cool like a dying glimmer until it can no longer radiate any more energy. The last vestige of the Sun will be a black dwarf, and this will be the ultimate fate of our Sun.

The Earth will always orbit a white dwarf. Because white dwarfs have a strong attraction, they will firmly attract the Earth.

No, it won't; Because this situation is relatively small, and it is very difficult to see such a situation, if it reaches the point where it reaches the point of being a letter to the point, then the earth may not be able to survive, and it may also orbit the white dwarf at that time, but this is also a relatively small possibility, and there is no specific evidence to prove.

The Earth will always orbit the white dwarf, and although the Sun will change, the Earth's orbit around the Sun will not change.

Human beings always talk about "forever", but nothing in the world can exist forever. It doesn't matter if it's the rocks, the earth, the ocean, or the sun above our heads. Scientists estimate that the Sun will burn up for about 5 billion years, after which it will continue to collapse and become a white dwarf.

When the sun becomes a white dwarf, what variables will the fate of the eight planets in the solar system usher in? At the end of the main-sequence star, the Sun will first transform into a red giant. The characteristic feature of a red giant star is that it expands rapidly in size, while the core continues to collapse inward.

Scientists expect that the Sun's outer space will reach the vicinity of Mars by then.

When the time comes, Mercury, Venus and the Earth will merge with Mother Sun, and life on Earth will naturally cease to exist. And the fate of Mars will not be much better, it will be vaporized directly by the heat of the sun's outer space and disappear into the universe. In the red giant stage, the ecology of the entire solar system is almost destroyed, none of the solid planets in it survive, and the atmosphere of Jupiter, Saturn and other planets in outer space will be continuously evaporated by the sun's thermal radiation, and finally only a solid core is left.

Jupiter, for example, has a solid-state core that is larger than Earth's. After the red giant phase, the Sun transforms into a white dwarf, and the mass of the Minnesotan orange white dwarf is only half that of the Sun, and although it is also emitting heat, its gravitational pull and heat magnitude are also dissipating over time. At that time, the star systems near the solar system will have the ability to intervene in the solar system.

The Sun's grip on the remaining planets will become increasingly inadequate. After tens of billions of years, the Sun will lose control of these planets, and they will leave the Sun's bondage and travel to other parts of the galaxy as wandering planets. And our sun will experience about 50 billion to 100 billion years of loneliness and loneliness.

Until it cools down and becomes a black cold star, a black dwarf. What do you think?

A white dwarf is a low-luminosity, white-tinged light, high-temperature, high-density object, which is the product of the end of the evolution of a low-mass star like the Sun.

Before the Sun actually turns into a white dwarf, all life on Earth will be wiped out, but at least it will be a sphere.

The Sun converts into a white dwarf according to the characteristics of the white type, before the Sun becomes a white dwarf. will become a red giant first. The diameter of the Sun will reach the edge of Mars. Maybe by that time the earth will be gone.

He doesn't have that much temperature when the Sun turns into a white dwarf, and he goes crazy devouring the planets around him, and Earth is not immune

The latest findings show that the sun's heat and light are not caused by nuclear fusion, but by gravitational focusing. This is the most convincing discovery, a major discovery that subverts human cognition, comparable to heliocentrism.

The sun originally relied on the huge radiation pressure generated by nuclear fusion to resist its own gravitational pull, but when the nuclear fuel was exhausted, the radiation pressure could not maintain its own gravitational force, so it collapsed into a high-density star, a white dwarf.

Yes, those below the mass of the Sun will become white dwarfs, those about 3 times will become neutron stars, and those above 3 times may become black holes.

With the mass of the sun, after the reaction of hydrogen fusion to helium, the fusion of helium to carbon will continue, but the mass is not enough to occur carbon nuclear fusion reaction, then the sun layer will be due to the action of gravitational potential energy, release a large amount of energy, blow out the external material, this is called a nova explosion, (not a supernova explosion,) after the sun will become a white dwarf, the structure will be very stable, (unless the absorption of other large objects to make the mass reach the level of carbon fusion) the initial temperature of the white dwarf is still very high, There may also be a small-scale carbon-nitrogen-oxygen cycle, after which the temperature slowly drops and eventually dies down.

Probably a white dwarf.

The galaxy is gone, and the sun will still exist.

Rest assured, the earth will die first; If not, the Sun will expand first, swallow Mercury, Venus, Earth, and the Moon before collapsing, and finally lose its light.