Sina Science and Technology News Beijing time November 4 news, according tomedia reports, although our sun is still very young, can continue to burn and shine for about 4.5 billion years, but one day, it will die, then what will happen to our solar system? I’m afraid the trouble began before the sun died. The first thing we have to face is the old sun itself. As hydrogen in the sun continues to accumulate, helium, the product of the hydrogen fusion reaction, accumulates in the sun’s core.
The current solar system, artistic renderings
As useless by-products become more and more around, the sun’s fusion response becomes more and more difficult. However, the iningiary pressure of the sun’s atmosphere has not changed. Therefore, in order to maintain the balance, the sun can only increase the temperature of the fusion reaction, the resulting core temperature is also higher and higher.
This means that as the sun gets older, it will gradually become brighter. Dinosaurs, for example, saw a darker sun than we do today. But in a few hundred million years, our planet will become very hot under the scorching sun.
Our atmosphere will be gone. The ocean evaporates. For a while, Earth and Venus would be a little similar, encased in suffocating carbon dioxide atmospheric clusters.
Then something worse happened.
In the final stages of hydrogen fusion, the sun expands, deforms and turns red. A huge red sun is sure to devour Mercury and Venus. The earth may be swallowed up in the same way, or it may escape, depending on how much the sun expands. If the sun’s expanding atmosphere also drowns our world, the earth will disappear in less than a day.
But even if the sun doesn’t swell to the extent that it devours the earth, our fate is not much better. The extreme energy released by the sun will be enough to vaporize the rock. By then, I’m afraid there will be only one big iron ball left on our planet.
Solar radiation increases, and naturally it’s not a good thing for external planets. Saturn’s rings are made up of almost impurities-free water ice. In the future, Saturn’s rings will cease to exist as the sun temperature rises. The frozen worlds that orbit these exoplanets will no longer exist. Canon, Titan, and so on will lose their ice and snow shell.
At first, only increased radiation would destroy the four exoplanets and deprive them of their atmospheres. These atmospheres are as vulnerable as the Earth’s. However, as the sun continues to expand, the outer volumes of the sun’s atmosphere will need to find these exoplanets. With these substances, exoplanets can devour themselves and become much larger than ever before.
But at this point, the sun will not stop. In the final stages of the sun’s life, it expands and contracts like a heart, a process that will last for millions of years. In terms of gravity, this is not the most stable state. A crazy sun can attract and reject exoplanets in strange directions, which can lead to fatal collisions between exoplanets or kick them out of the solar system al.
In the next few hundred million years, the outermost part of the solar system will become a habitable place for humans. When the huge red sun releases so much heat and radiation, the habitable region (the area around the star where the temperature just keeps liquid water) moves outwards.
As mentioned above, at first, the moons of exoplanets will melt. After losing their ice and snow shells, their surfaces may have liquid water oceans. Eventually, the Kerber Belt objects, including Pluto and its mysterious companions, will also lose frost. One of the largest objects could become a mini-Earth, orbiting a deformed red sun in a distant place.
Next, our sun will give up its struggle and fade the outer atmosphere in a series of big explosions, leaving only the core of the star: a blazing of carbon and oxygen.
The newly formed white dwarf is still very hot, releasing X-rays that could be deadly enough to kill known life. But in another billion years or so, the white dwarf will gradually cool to a temperature that is easier to control, and then stay in the vast universe for a long time.
This bleak white dwarf will create a new habitable zone. However, because the former sun is now not hot enough, this new habitable area will be very, very close to the white dwarf, closer to Mercury’s current orbit around the sun.
At such a distance, any planet (or planet’s core) would be at risk of being disintegrated by tidal forces, the gravitational forces of white dwarfs that unintittingly tear the planets to pieces.
But it’s probably the best outcome we can get. (Uniform)