There used to be three earths in the solar system. Now they still exist, but they have become a wilderness

##13.8 billion years ago, there was a big explosion at a mysterious singularity. After the big explosion, space expanded rapidly, and various substances began to form, and then evolved into stars, planets and other celestial bodies. This is the origin of the universe and the formation pattern of celestial bodies.

Stars and planets are the basic celestial bodies in the universe, and they are also the most common types of celestial bodies. Stars and planets together form a small galaxy. The stability of these small galaxies contributes to the stability of the whole universe. So how did these little galaxies form? What kind of process will it be? For this problem, scientists have been studying and exploring.

The galaxy where the earth is located is called the solar system. It is a small galaxy with eight planets, of which the earth is the only planet of intelligent life. Scientists have been trying to figure out how the solar system came into being and what the early solar system looked like? But time can’t go back. We can’t go back billions of years to witness the birth of the solar system and the early planets.

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Although we can’t witness the evolution of the whole solar system, we still hope to understand the early evolution of the solar system. The reason is that with the continuous progress of human science and technology, we can see the deeper universe, and there are countless small galaxies like the solar system in the universe.

Some galaxies are older than the solar system, while others are just born and undergoing a series of evolution. There is no essential difference in the overall structure between the solar system and other galaxies. They are all stars in the center, with different numbers of planets circling around the stars. Of course, some galaxies may have two or three stars in the center, which we call two star system or three star system.

For single star systems like the solar system, their birth and later planetary evolution are basically the same. The only difference is that some galaxies will have the birth of living stars, while others will not. So, we want to understand the evolution of the solar system, and we can get a very good data by observing other newly born stellar systems.

Scientists have found that the formation of stellar system is inseparable from the gravitational effect of the host star through long-term study of new galaxies. Because under its gravity, the discrete matter in the galaxy will gradually gather together, and gradually form planets with the passage of time. Planets also promote the formation of satellites through gravity.

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The early solar system was almost the same process. The main star, the sun, was first formed. Then, under the action of the solar gravity, the discrete matter of the solar system began to gather continuously, forming various kinds of planets of different sizes. Scientists speculate that when the early solar system was just formed, there might be about 100 planets.

Although the number of planets in the early solar system is very large, but because of the energy and material changes in the solar system at that time, the space environment is very bad, leading to the frequent occurrence of planetary collision events. If an asteroid hits a large planet, it will be smashed into a part of the planet, thus strengthening the planet.

If it is a planetary collision of the same level, the scene will be very violent, which may make both planets become debris. The asteroid belt between Mars and Jupiter may be the result of the planetary collision in the early solar system. At that time, the earth was also inevitably impacted by celestial bodies, and it was a Mars sized celestial body.

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Fortunately, a Mars sized planet didn’t hit the earth head-on, but hit it side by side. Even so, a large amount of earth material was hit into space, and later the moon was formed by new aggregation. This is the widely accepted theory of the origin of the moon.

In addition, through computer simulation of the early evolution of the solar system, some researchers found that there might have been three “earths” at that time, and these “earths” still exist today. They are Venus, Mars and earth. Scientists believe that the early solar system, Venus, earth and Mars are not very different, are beautiful blue stars, above the atmosphere, liquid water and magnetic field.

But later, due to the different major changes of Venus and Mars, the ecosystem of these two planets suffered serious damage, and then gradually evolved into a lifeless planet. For Venus to become such a purgatory planet, scientists think it may be related to the less water on it in the early days.

You know, these three planets are all rock planets. Since they are rock planets, there must be active geological activities, especially in the early days, volcanic activities were very intense. The earth’s early water resources may be more abundant than now. Through some research, scientists have found that the earth may have no land at all long ago, and the surface is full of water.

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Sufficient water resources can effectively absorb a large amount of carbon dioxide produced by volcanic eruption, and also can effectively cool the earth. So the earth survived that dark period and ushered in the golden age of development. However, due to the lack of water on the surface of Venus, volcanic eruptions will soon consume all the water, without water absorption, a large amount of carbon dioxide is released into the atmosphere, causing a serious greenhouse effect.

The cataclysmic process of Mars may be different from that of Venus, because Mars is far away from the sun and at the edge of the habitable zone, and the volcanic activity of Mars is far less intense than that of Venus. So Mars is what it is now, maybe it’s something else. Scientists speculate that it may be caused by the impact of a huge asteroid. You should know that Mars is surrounded by an asteroid belt, and there are so many asteroid threats at home that it will bring great harm if it is not properly handled.

It is possible that a long time ago, Mars was hit by a huge asteroid, and the impact wave went directly to the earth’s core, which destroyed the operation of the earth’s core and caused the disappearance of the magnetic field. At the same time, the impact wave also triggered intense geological activities, and the volcanic eruption led to ecological upheaval. Without the protection of magnetic field, the atmosphere can not be bound, so the Martian atmosphere is constantly losing, and the surface water resources are also constantly losing, and finally become such a desolate state.

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Because the ecological upheaval on Mars is different from that on Venus, scientists believe that Mars still has a lot of water, which exists underground and in the cold parts of Antarctica. Moreover, the ecosystem itself has the ability of self recovery. Although Mars is desolate now, after a long time, the ecosystem may have been slowly recovering, and the future Mars may be better and better. As long as we go through some technological improvements, Mars in the future may become the second earth for human beings.

Guys, what do you think of this? Welcome to leave a message below to discuss and express your opinions.

Single choice | which one of Mars and Venus is most likely to become the second earth of mankind?

Mars

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Venus

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