As a yellow dwarf, the final fate of the sun is also related to the fate of the solar system. Over the years, scientists have used a variety of modeling analyses in the hope of predicting the outcome of the solar system in advance, until recently, 6500 light-years away from Earth, a Death Star appeared in front of scientists' eyes, which looked as if it were a future solar system, hinting at our end.
<h1 class="pgc-h-arrow-right" Data-track="2" what is the end of the solar system >? </h1>
From the perspective of the evolution of the sun, the remaining lifespan of the sun is about 5-7 billion years, after which the sun will eventually collapse into a white dwarf after going through the stage of red giant stars, which also announces the official end of the solar system.
However, around the sun, there are many planets, moons and other celestial bodies, what is the fate of each celestial body in the solar system? Take Earth, for example, if humans have been living on Earth, or if we can never leave the solar system, will we still have the possibility of being alive when the Sun becomes a white dwarf?
Obviously, these problems are related to the ultimate fate of mankind, and for many years, scientists have hoped that the reference white dwarf star system can be found in the universe to see whether there are surviving planets around it, but because the planets themselves are not luminous, they are seen because they are refracted by the light of the star, or the periodic shadows that appear when passing through the surface of the star.
Therefore, it was not easy to detect the existence of exoplanets around white dwarfs, until some time ago, 6500 light-years away, scientists discovered a planet similar to Jupiter, which orbits a white dwarf star and is the survivor of the star system after it has come to an end.
The study believes that this Jupiter-like exoplanet, which should have been far away from the star in the first place, is not a more common "hot Jupiter" in the universe, because if it solves the star at close range, it will be swallowed up by the star the moment the star expands into a red giant.
This also means that the exoplanet should be in a star system similar to the solar system, and its original orbit should be similar to the distance between Jupiter and the Sun.
According to estimates, the distance between the exoplanet and the white dwarf is about half of the distance between Jupiter and the Sun, which also means that when the Sun enters the red giant stage and begins to expand rapidly, then, in addition to Mercury and Venus will be 100% swallowed up, the Earth and Mars, as well as the moons around Jupiter and other more distant objects of the solar system, are likely to survive.
<h1 class="pgc-h-arrow-right" data-track="24" > so, if humans could not do without the solar system, would we still exist? </h1>
In past modeling analyses, researchers have argued that after the Sun expands, the radius extends outward, it may reach the orbit of the Earth, which means that even if the Earth is not swallowed up, the Earth will become a planet extremely close to the white dwarf.
Through the study of this white dwarf system at a distance of 6500 light years, some scientists speculate that if there are rocky planets, or moons or asteroids, around the white dwarf, close enough to it, then, although the light of the white dwarf is extremely dim, the energy it releases can still provide sufficient life support for life on these celestial bodies.
Of course, the minimum requirement for this distance is also a prerequisite, that is, the distance between these celestial bodies and white dwarfs must be within 10% of the current distance between Mercury and the Sun.
So, as long as Earth isn't swallowed up, and before that, we have the ability to leave Earth and colonize Mars, or some moon around Jupiter.
Then, there is still a way for human beings to become white dwarfs in the sun, and the solar system can continue to survive after the end of evolution, and according to the evolution time of white dwarfs, it can still continue to exist in the solar system for billions of years.
It seems that the main human being has a way to leave the earth, and we have a way to continue to live in the universe all the time, but in fact it is not as easy as we think.
Because one of the keys to the perpetuation of human civilization is that human beings leave the solar system and have the ability to migrate to other star systems before every star system changes, otherwise, when the white dwarf comes to an end, we will still be dead.
<h1 class="pgc-h-arrow-right" data-track="25" > so what is the ultimate fate of white dwarfs? </h1>
The study believes that the ultimate fate of a white dwarf is to become a black dwarf, which is also the real epilogue stage in the evolution of life of small and medium-mass stars such as the Sun.
When it becomes a black dwarf, it will no longer be able to produce energy radiation, and if no new stars are born in the universe, and all the small and medium-mass stars become black dwarfs, then it means the death of the universe.
However , black dwarfs are hypothetical objects , and there are currently no discoveries of black dwarfs in the universe. Because research believes that it takes about 200 trillion years to change from a small and medium-mass star to a black dwarf, the age of the universe is only 13.77 billion years old today.
This also means that there is no black dwarf in the universe at all, so what is the ultimate fate of white dwarfs and the universe, which still needs a long cosmic evolution to give the answer, can humans wait until that day?