The end of the solar system: The expansion and heating of the sun may engulf the earth, and Mars may extend the existence of life

As we all know, the earth we live on is one of the eight planets in the solar system. Current research has shown that it is also the only planet in the solar system that has life.

The sun is a star that brings light and heat to several major planets in the solar system. As people living on the earth, we have obviously felt that the temperature has increased year by year in these years. If the sun gets hotter and hotter, then we will How about it.

The reason why the sun can always radiate heat outward is because when the sun was first formed, it was made up of a large amount of gas, mainly hydrogen, which was attracted by its own gravity and continued to collapse inward, finally forming A star.

As the sun continues to collapse the hydrogen gas, the atoms in these gases continue to collide - this is like a large number of people crowded into a room that is constantly getting smaller. As the space becomes smaller, , the collision between people will become more and more intense - the result of the collision will cause the temperature of the entire collapsing star to continue to rise, and finally the temperature will continue to rise and condense into helium.

The star is like a nuclear bomb exploding, releasing a large amount of heat that makes the star glow.

When the pressure of the gas inside the sun is balanced with its own gravity, this balance will be maintained and the sun will continue to glow and heat - forming the main sequence stage of the sun.

During the sun's main sequence phase, the temperature of the sun remains basically stable. Although humans living on the earth can still feel the increase in temperature, it is still within a range that is completely acceptable to us.

Experts predict that the sun's core fuel can last about 5 billion years.

The more massive a star is, the more fuel it needs to balance its own gravity, and the faster its internal fuel is consumed.

When the fuel is exhausted, the star (such as the sun) will continue to shrink depending on its mass, and eventually become a white dwarf, neutron star or even a black hole.

Then the sun, a star, follows the above-mentioned change process. When its fuel gradually runs out and its mass continues to shrink, the sun reaches the red giant stage.

What will happen to us humans living on earth? Or will there be no life on earth before that day comes? Or, the Earth and other planets in the solar system may have ceased to exist before the sun collapsed.

When the sun reaches the red giant stage, its biggest feature is the rising temperature. Experts say that the temperature of the sun will be 2.2 times the current temperature, and the average temperature of the earth will be about 60 degrees higher than now. It is conceivable that all water on the earth, including the oceans, will cease to exist, and life on the earth will also cease to exist.

In addition to the increase in temperature, as the sun continues to use up its fuel, the mass of the sun becomes smaller and smaller, the gravity weakens, and the distance between the planets and the sun will be increased. As high-temperature gases continue to emit from the outside of the sun, Mercury and Venus, which are closest to the earth, will be completely swallowed by the sun. This is why many countries are not interested in detecting the two planets.

In addition, although the earth is farther from the sun than Mercury and Venus, even if the sun does not engulf it, it will become the closest planet to the sun. At that time, the temperature on the earth will definitely not be suitable for life. .

On the contrary, Mars may become habitable by then, which also explains why the United States turns to studying Mars.

At the same time, several other major planets in the solar system will survive, including Saturn and Jupiter. Finally, they will continue to move around the cooled and unable to emit sun, and the solar system will return to its original calm and darkness.

At present, experts say that they have discovered the existence of brine on Mars. If humans successfully explore Mars and the conditions behind Mars are suitable for human survival, humans will be able to continue to immigrate to Mars, survive for a while, and continue their lives.