Lead
Our Earth is not alone, it has eight friends who revolve around the Sun like it, and these nine planets make up a lively solar system.
While the sun is the leader of the solar system, it is not the only one.
There are a large number of solar systems in the Milky Way, and the Sun is just an ordinary member of the Milky Way, its number is not even one percent of the number of stars in the Milky Way, but the number of planets contained in the Milky Way is quite impressive.
There are nine planets and dozens of moons in the solar system, which together move around the sun and form the microcosm of the solar system.
However, the Sun is not eternal, and will one day age and eventually become a pitch-black white dwarf, so what will happen to its friends?
Will they be dragged by the sun to continue their motion, or will they be aimless without the sun as a core?
1. The star and its planets.
The earth and its friends move around the sun together.
The first planets were formed in the process of the formation of the sun, and in the process of the formation of the sun, a large amount of gas and dust were gathered to form the primordial sun, and the primordial sun gradually transformed into stars, and the gas and dust that were not attracted to the vicinity of the sun continued to accumulate during the formation process, forming primordial planets, and then these primordial planets moved around the stars like the sun, so a "parent-child relationship" was formed between the original planets and the sun.
But this "parent-child relationship" did not last long, as the universe evolved, the sun also became more stable, and no longer had the ability to attract and accumulate primordial gas and dust, so the first planet to form was the earth and its friends.
However, although the "parent-child relationship" of the sun did not last long, the sun still had a great influence on them, the sun is the center of the solar system, and all the planets move around the sun.
In addition to this, the sun warms up the planets and moons in the solar system through powerful light and heat energy.
As a result, the entire solar system appears to be more vibrant, with all the planets and moons showing great vitality and people loving the solar system even more because of them.
Although people have known for a long time that the sun is the center of the solar system, after years of exploration, scientists found that the initial thought that "Venus" is the closest planet to the sun in the solar system, and it is hotter than the earth This understanding is wrong, in fact, the closest planet to the sun is "Mercury", Mars is also affected by the sun like the earth and becomes extremely cold, and Venus is as warm as the earth.
Compared to these planets, the coldest planet in the solar system is "Pluto", but even Pluto is not as extreme as the environment in which the Earth is located, so the Earth is a more habitable planet in the solar system.
Thanks to the efforts of scientists, human beings have explored various planets in the solar system, and people know that there are relatively rare planets in the solar system, such as "stars" and "Uranus", and there are also huge planets of the size of Jupiter in addition to the planets in the solar system.
However, outside the solar system, it is relatively vague, because of the limitations of science and technology, human beings do not have the ability to explore planets outside the solar system, and most of the planets outside the solar system that people see are vague star spots, so human beings still have a long way to go in exploring planets outside the solar system.
2. What will happen to the planets after the death of stars?
There are many ways in which stars die, and different ways of dying can have different effects on the planets that orbit the star.
But in general, after the death of the sun, the ball will also become extremely cold and even destroyed.
According to the observation and statistics of scientists, stars can be roughly divided into three types: small stars, medium stars and large stars, but these three types of stars can be subdivided into four types according to their mode of death: red giants, white dwarfs, supernova explosions and red dwarfs.
Small stars form red giants when they die and then fade into red dwarfs, while large stars explode supernova when they die, forming black holes, and medium stars become white dwarfs when they die.
Therefore, the Sun can be classified as a medium star, and it will also become a white dwarf when it dies.
So what will happen to the Earth and its friends after the death of the sun?
First of all, the sun will gradually decline, and at the same time as it becomes a red giant, it will expand outward, and then all the planets in the solar system will be swallowed up, and the earth will be no exception, but it will not be swallowed by the sun, but will be blown away by the outer layer of the sun, and at that time, the sun will become a red giant and the volume will be much larger than the sun is today, so the earth will drift outward with the blowing of the outer layer of the sun.
When the Sun shrinks again and becomes a white dwarf, the Earth and other planets will return to the Sun.
But at this time, the sun is only a few million times the volume of today, and at the same time, it once became a red giant, making the original white dwarf 5 billion years later become a white dwarf in advance, so the earth will soon be attracted by the sun's gravity to the sun's side and move around the white dwarf.
However, although the gravity of the newly turned white dwarf is small, it is still the Sun, so the planets orbiting it are about the same speed.
But planets orbiting white dwarfs can't change the fact that the sun doesn't shine anymore when it dies.
As a result, the planets and moons of the solar system will also become extremely cold, and will even freeze with little vitality.
But even so, it is possible that there is still life on Earth, and that life may have landed on Earth for some reason, or that there were enough advanced species to migrate to escape the sun's blowing when the sun died.
Therefore, the Earth may still have life after the death of the Sun, and these life will continue to grow and reproduce according to the laws of the Earth until the Earth finally becomes frozen like Jupiter's moon Titan.
But if the Sun is closer to planets such as Earth, it is possible that these planets will be engulfed by the Sun before the Sun dies and expands into red giants, at which point the orbits of the planets orbiting the white dwarf will change dramatically, or even almost non-existent.
Therefore, after the death of the sun, it is also possible that the earth will not live long because of the loss of the core of the sun, and will eventually be absorbed by the white dwarf and become a lonely little white dwarf.
If the Sun dies and is farther away from planets such as Earth, then these planets will disappear when the Sun dies, and at that time, the Earth will be floating in the universe, and very little life will survive.
3. The fate of the planets depends not only on the sun.
After the death of the Sun, the fate of the planets orbiting it may also be changed due to other factors.
How other stars have taken over the Sun's position will continue to have an impact on the planets that orbit it.
It is possible that the new star and the Sun are of the same species, but it is also possible that they are of different species.
Stars of the same kind, such as red giants, will continue to blow away the outer layers of the original sun, taking away the planets, and the planets that were in darkness after the death of the sun also have a new source of light and become warmer, and this new light source has an important impact on the temperature of the planet and the existence of life.
Different kinds of stars, such as black holes, black holes are super vampires in the universe, because they have a significant attraction to light, so there will be fewer light sources on the planets around it, but the attraction of black holes is not only a significant attraction to light, but also to a large amount of matter, so it is also possible that planets will eventually be swallowed by black holes, but black holes do not swallow forever, when there is very little material around the black hole, the black hole will eventually disappear.
If the new Sun is a red dwarf, the red dwarf is small and will have little impact on the planets around it, but because it is also not very well illuminated, the planet can easily become cold or even frozen.
But even so, life on the planet is still likely to endure.
In general, after the death of the Sun, the planets orbiting it will be affected to varying degrees, and there may be good and bad sides.
The ultimate fate of the planets can be summarized into three types: one is to experience the aftermath of the catastrophe, which is the best fate, the second is to be destroyed, which is the worst fate, and the third is to grow old with the stars.
epilogue
But that's just in general, different planets may have more possibilities, so the fate of the planets may be unpredictable.
However, with the development of science and technology, the exploration of planets outside the solar system will become more and more in-depth, and it is possible to discover more interesting phenomena in future exploration.
However, not only planets, but also planets that orbit it and various other stars after the death of the sun may have more possibilities, which are worth continuing to explore by scientists.