"Drow Venus!" the name popped up in Lu Yuan's mind first.

"It turns out that there really is a Drow Venus!" Although Lu Yuan knew that there was such a planet in the solar system before.

But after all, that's just speculation, and now that he really saw this planet, Lu Yuan still felt very excited.

Looking at Drow Venus, Lu Yuan still turned his gaze to the earth, which should be said to be the ancient earth.

The earth's geological movements at this time are very active.

The entire earth's crust is full of volcanoes, and these volcanoes are constantly erupting, and as volcanoes erupt, large amounts of gas are also released into the atmosphere.

In Lu Yuan's view, the ancient Earth is more similar to the current Venus, except that its geological activity is more active.

The field of vision gradually narrowed, and Lu Yuan's eyes showed a surprised expression.

He suddenly discovered that the earth at this time was actually larger than the modern earth.

But these are not the most critical, the most important thing is that he did not find the moon next to the earth.

There was no moon on the ancient earth, which made Lu Yuan feel very shocked.

"How can the earth not have a moon!" Lu Yuan's face was full of incredulity.

At this time, he couldn't help but start thinking about the origin of the moon.

In fact, there have always been various controversies and hypotheses about how the moon came to be.

It can be summarized as follows: 1. Split theory. It is believed that the moon originated from the division of the earth. The Moon and the Earth are one and the same.

When the earth was still in a molten state during the formation of the earth, under the centrifugal force of high-speed rotation and the action of the sun's tides, a large piece of material flew out from the equator and cooled to form the moon.

2. The planets say. It is believed that the moon is an asteroid captured by the Earth.

The moon was originally an asteroid orbiting the sun, about 30~4 billion years ago, because of its proximity to the earth, it was captured by the earth's gravity, so it became a satellite of the earth.

3. Sun Nebula said. It is believed that the Moon originated from the Sun Nebula.

The Solar Nebula is centered around two of these larger clusters and condenses other cloud-like material to form the Earth and the Moon. Because the moon is small, it orbits the earth under the gravitational pull of the earth.

4. Collision theory. Think that the Earth collided with a small planet.

The Earth was the first planet to exist, and later, a planet collided with the Earth at an oblique angle at a speed of 11 kilometers per second, thus throwing out a lot of atomized rock material to rotate around the Earth, and later, these atomized substances gradually condensed into the Moon.

In addition to the above four statements, there is also the theory of an artificial moon, which Lu Yuan has seen in many novels.

He remembers most of a novel about the Atlanteans building the moon.

In addition, there have been various rumors on the Internet that the inside of the moon is hollow, so when Lu Yuan was young, he once suspected that the moon was man-made.

He even had a suspicion that the moon was actually a giant spaceship built by aliens.

However, as he grew older, Lu Yuan came into contact with more knowledge, and in the articles he was able to access, almost all of them denied the claim that the moon was man-made.

Lu Yuan looked up at the starry sky in front of him, and quickly denied the theory of planets and the theory of the sun and nebula.

As far as his eyes could see, there was no such large asteroid at all.

As for the solar nebula, it is even more unbelievable, because there are not many remnants of nebulae in the solar system at this time.

And the rest of these remnants are also in the outer solar system.

The Earth in front of us is obviously larger than the Earth in later generations, and although the Earth's geological activity is relatively active now, it is very stable as a whole.

Therefore, at this time, Lu Yuan's judgment of the "collision theory" may be more likely.

While Lu Yuan was thinking about things, the vicissitudes of life continued to take place around him.

To Lu Yuan's surprise, the earliest life in the solar system was neither Earth, nor Venus or Drow Venus, nor Mars, but appeared on one of Saturn's moons.

This satellite is Titan. I believe that friends who have watched the movie "The Avengers" should not feel unfamiliar with this planet.

This planet is the home of the great villain Thanos, that is, Titan.

Titan is the second largest moon in the solar system and the largest moon of Saturn.

It is also the only moon in the solar system with a thick atmosphere.

Modern studies have shown that the surface gravity of Titan is extremely low, comparable to that of the Moon, but it has a thick atmosphere with a surface pressure of about 1.5 times that of the Earth.

This peculiar phenomenon is a good subject for the study of planetary atmospheres. At the same time, the thick atmosphere combined with fairly low surface gravity makes landing and take-off easier.

In fact, modern scientists have always been highly suspicious of the existence of life on Titan, and everyone speculates that the methane in its atmosphere may be the basis of life.

But even so, Lu Yuan never thought that Titan was the first planet in the solar system to have life.

When Lu Yuan was still shocked by the first birth of Titan Star, something that shocked him even more happened again.

In the blink of an eye, life began to emerge on Earth, Venus, Venus on Drow, and Mars, and finally on Europa and Europa.

"Could it be that life is originally universal in the universe?"

Looking at everything in front of him, Lu Yuan couldn't help but start to have doubts in his heart.

"But why, modern scientists have not been able to find other life in the universe?"

At this time, Lu Yuan suddenly remembered an unknown bamboo slip found in the ancient city of Mojia.

The bamboo slip clearly depicts a war, but scholars have not been able to confirm that he was recording that war.

The wars recorded in the bamboo slips are clearly not like wars on earth.

At the same time, Lu Yuan remembered an article he had read when he was in school.

Lu Yuan, the author of the article, can't remember it, but Lu Yuan can't forget the content.

Because in this article, the author makes a very bold conjecture.

The authors believe that the Milky Way is already a dead galaxy in fact.

It has largely lost the ability to create new stars.

Not only that, but the author also gives the reason for all this in the article.

In the article, the author proposes that there is likely to be a large-scale war in the galaxy that will affect the entire galaxy.

Lu Yuan also hoped that he could give his own answer in this illusion at this time.

Time passed little by little, and the scene he saw became more and more familiar to Lu Yuan.

Life on the planets is also flourishing.

Lu Yuan finally saw intelligent life, and they had the opportunity to appear on Titan and Earth at the same time.

Lu Yuan speculated that the intelligent life that appeared on the earth was the first generation of human beings on the earth.