In 7 billion years, the Sun will become a white dwarf

The end of the Earth : Geologists speculate that the sun has been shining for 5 billion years. It is estimated that in another 5 billion years, most of the sun's hydrogen will polymerize into heavier helium, helium needs a higher temperature to polymerize into carbon, because helium is heavier, its gravitational pull will be stronger, so that the pressure in the center of the sun will increase, when the gas pressure increases, according to the gas law, the temperature will automatically increase, when the sun is mostly helium, its central temperature will increase by 10 times to the present, reaching 100 million degrees, helium will polymerize into heavier carbon, and then due to gravity will produce a higher temperature and polymerize carbon into nitrogen.

This repeats progressively to heavier substances such as oxygen, all the way to iron, and at high temperatures, all matter becomes gases.

When the sun's helium begins to coalesce, it will become a giant helium atomic bomb, expanding its diameter by more than 100 times. Due to excessive expansion, its surface temperature will decrease, causing the color of the sun's surface to change from the current high-temperature white to low-temperature red, becoming a "red giant".

For example, if a star has the same mass as the Sun, the atoms will merge into heavier matter in order until iron, and the energy consumed to coalesce into iron is equivalent to the energy produced, so there is no superfluous energy. As soon as the sun has no heat**, it begins to cool and shrink, and at the end it puts a high pressure on the center of the sun. It is so high that the outer electronic shell of the atom is crushed, so that the electrons no longer rotate outside the nucleon, and the electrons and nucleons become a high-density mixture with no regular structure, and then the sun becomes a "white dwarf", which gradually cools and dims, and becomes a "black dwarf".

At this point, the sun's activity is completely over.

If a star has 10 times the mass of the Sun, the temperature will rise very quickly during the convergence process, causing a "supernova" **, and a very dense neutron star will form at the center of the large **. If a star has more than 30 times the mass of the Sun, a black hole may form at the center of the large **.

When the Sun became a red giant, its apparent diameter increased by more than 100 times its current size. From Earth, the sun almost fills the sky during the day. It's scary.

Although the surface temperature of the sun is lower, because the area of the sun has increased tens of thousands of times and it is close to the earth, the excessive energy of the sun shining on the earth makes the ground too hot, the water on the ground turns into steam, and the ocean becomes a desert, and it is impossible for us to survive here. It is estimated that in 5 billion years, the sun will turn into a terrible red giant, and this will be the end of the world.

When the diameter of the sun's surface expands and swallows the earth into its belly, humanity will be wiped out, and perhaps humanity will already have another planet to live on.

By the time the sun is 9 billion years old, or 4 billion years later, the sun will run out of hydrogen and begin to have helium fusion that will last for a billion years, and it will evolve into a red giant, and it will become so huge that the giant sun will swallow up the Earth's orbit entirely.

And that's true, and I've seen reports that in 4 billion years the Sun will erupt, and the Earth, and Mars will be covered by the particles that the Sun is bursting out.

You can go as far as Jupiter!

And then there's the 3 billion year cooldown!

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.

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.

Five billion years from now, the Sun will become a red giant. It further transforms into a white dwarf, and finally for the sun itself, it is not dead, but only transforms from one celestial body to another.

During the red giant phase, the Sun swallows up Mercury and Venus. The earth will be roasted on a fire by the sun.

Eventually, the Sun will turn into a black dwarf. It will gradually become about the size of the Earth.

In the absence of external interference, the solar system will become a dark "ghost galaxy" in the universe, silently waiting for its final fate.

It is possible that the Earth would not exist. When a star ends its life, it becomes a white dwarf and a red dwarf. Massive stars become white dwarfs. If humanity is lucky enough to land on a white dwarf, it may also survive.

At that time, the earth should have been devoid of human beings, and it had become the most primitive form of the earth, without environmental pollution, only full of green.

The Earth will lose solar energy, and then there will be no life on the Earth.