"Your speculation, in fact, there have been many people in the astronomical community before."

Lang Tongguang heard Fang Yuan's speculation and continued to explain: "At the beginning, I thought that the asteroid belt was originally one or several planets, which were formed by splitting under the influence of some external factors.

However, it was later calculated that the combined mass of these asteroids was smaller than that of the Moon, so that they were not enough to constitute planets, and this hypothesis was slowly rejected by most astronomers.

"The astronomical community now believes that the asteroid belt was formed by some rock fragments in the early days of the formation of the solar system. Because of Jupiter's domineering gravity, it cannot coalesce into planets.

However, this statement is actually speculation, and no one knows what the truth is. The age of the solar system is 5 billion years, and no one knows what happened in such a long time.

"If the microbes in this meteorite are really the microorganisms native to the solar system, maybe a new answer will be given."

After listening to Lang Tongguang's explanation, Fang Yuan pondered and asked, "The sum of the masses of the asteroid belt is so small?" ”

"Yes, the sum of the masses of the asteroid belt is not as large as the mass of the moon now." Lang Tongguang confirmed again.

"So, this guess of mine is completely impossible?" Fang Yuan frowned and pondered.

Lang Tongguang pondered for a moment and replied, "It's not completely impossible. According to the current astronomical research on the asteroid belt, in the early days of the formation of the solar system, the mass of the asteroid belt was about the same as that of the earth. It was slowly reduced in the course of later evolution.

"After all, the size and mass of the stars in the asteroid belt are too small to be easily affected by the gravitational pull of other stars and be sucked in.

"Jupiter is a very domineering planet, more than a thousand times the size of Earth.

"In the solar system, except for Jupiter, all the planets such as Earth and Mars combined have less than half the mass of Jupiter.

"Everyone should know that in the solar system, the mass of the sun accounts for 99.86% of the total mass of the solar system, and it is conceivable that almost all the mass in the solar system is on the sun.

However, the presence of Jupiter has pulled the mass center of the solar system, which is not inside the sun, but outside the sun.

"Let's put it this way. Jupiter, if it is more massive, may even become a star.

"So, Jupiter's gravitational pull is very domineering, pulling the stars of the asteroid belt and preventing them from forming planets."

Lang Tongguang then explained: "However, it can also be seen from this point that the stars of the asteroid belt are easily affected by other planets due to their small mass.

"Over billions of years, asteroids will continue to be captured by other stars, and their mass will continue to decrease.

"According to research, in the early days of the formation of the solar system, the mass of the asteroid belt was about the same as that of the Earth.

"Therefore, in the orbit of the asteroid belt, there is still a possibility that there is a terrestrial planet.

"It's just that no more evidence has been found to prove this now, and all speculation is just hypothesis."

The evolution of the asteroid belt was discussed.

Then, the attention was turned back to the meteorite microbes.

Fang Yuan pointed to the five-meter-diameter meteorite in front of him and asked, "Professor Lang, can you know where this meteorite came from through analysis?" ”

Lang Tongguang patiently replied: "Actually, before we came, we had already checked the relevant information and knew the original orbital data of this meteorite. Before approaching the Earth, its orbit was indeed near the asteroid belt.

"It can be determined that this meteorite was indeed a piece of the asteroid belt before that. However, its orbit is somewhat offset, and it is difficult to say whether it came from other galaxies before entering the asteroid belt. ”

When he said this, he paused, pointed to a location on the meteorite, and said, "Look here, there are traces of cracks here.

"Judging by this rupture mark, the meteorite was not originally so small, but it was impacted and shattered into many pieces, and this is one of them.

Perhaps, its orbit changed because of this impact.

"In short, based on what is known so far, it is not possible to determine whether it is from the solar system or other galaxies.

"If I had to make a choice, I'd like it to come from another galaxy."

After Lang Tongguang finished speaking, he sighed imperceptibly.

"Why?" Fang Yuan asked curiously.

"If this meteorite is really native to the solar system, then your previous speculation may be true. If that's the case, then the fate of the solar system is too bumpy. Lang Tongguang sighed.

When everyone heard his explanation, they all understood what he was trying to say.

According to Fang Yuan's guess, there was once a terrestrial planet near the orbit of the asteroid belt.

On this terrestrial planet, there is a kind of life, even an intelligent species.

However, in the end, the terrestrial planet shattered into 600,000 pieces, what terrible events caused it?

If this speculation is true.

That shows that human beings are not the first civilization in the solar system, and there was a civilization before human beings, but because of a terrible event, it was destroyed in the long river of history.

Now, humanity is facing the same fate.

Fang Yuan took a deep breath and asked, "Professor Lang, will the collision between the Earth and the Star Beast World explode into hundreds of thousands of pieces?" ”

"This ...... That's beyond my knowledge, and I can't give an answer. Lang Tongguang shook his head slowly.

This question is indeed beyond the scope of astronomy, and has already involved the four-dimensional realm, which is indeed not something he can answer.

Fang Yuan thought of another possibility.

If there was a terrestrial planet near the orbit of the asteroid belt, and there was a civilization on it.

In the end, the terrestrial planet shattered into hundreds of thousands of pieces, as if it had collided with other planets.

If this speculation is true, then what is this so-called impact?

Now that Earth and the Star Beast World are colliding in the fourth dimension, what will happen if they collide together?

Eve understood what Fang Yuan meant, frowned and said, "It shouldn't be possible." The collision between the Earth and the Star Beast World is so slow, it will take another twenty years to completely collide together. At such a slow speed, even if you collide together, you won't explode, right? ”

Fang Yuan shook his head and said, "That's not necessarily, the collision between the Earth and the Star Beast World seems to happen very slowly, but don't ignore one thing, the three-dimensional distance between the Earth and the Star Beast World is 1,000 light years.

"With such a long distance, it took decades to collide, do you still think that the collision is not intense?"

Eve was stunned when she heard this thought.

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