super robot clone

The moon is indeed very small. At a glance, the lunar horizon is close at hand (about 2.5 kilometers), and the moon's surface intersects with space, showing an obvious arc.

The sun had just risen from the east of the moon horizon, and the scorching light shone on the moon, casting a large area of ​​light and shadow. The surrounding area was empty and lonely, and the sky was full of stars, giving people an extremely vast and magnificent feeling. (Stars can be seen on the moon no matter day or night, but due to the photosensitive problem of the camera, we will find that whether it is a Chinese or an American lunar spacecraft, the sky photographed from the moon will always be dark.)

The gravity on the moon is very small. Chen Xin tried to jump up and down on the moon, and he could easily jump up to a height of two or three meters. It seemed that he could escape the gravity of the moon and fly into the universe with a little more force. .

Steel Coin also jumped off the lunar rover, and imitated him, jumping and rolling all over the ground, and laughed excitedly: "Haha, it's so cool, old Dou, I haven't smelled such a pure smell of the universe for a long time." gone."

Although the earth's environment is very comfortable for human beings, steel is not very suitable for it. Whether it is sticky air or humid water, it feels awkward. What it likes most is this pure vacuum.

Chen Xin shook his head and laughed dumbfoundedly as he looked at the steel coin that was having fun at the side.

The two circled around the spacecraft, and quickly trampled the thick layer of lunar soil around them beyond recognition.

A large amount of lunar soil was lifted up, staining the silver-white space suit with a layer of dust.

Since the moon has no atmosphere, the temperature difference between the sunlit area and the dark area on the lunar surface is huge. This drastic temperature change causes thermal expansion and contraction, which can cause rocks to crack.

Fractured rocks are exposed to the sun's ultraviolet light, X-rays and gamma rays for a long time.The crystalline structure of the rock is destroyed, which promotes the further fragmentation of the rock.

Coupled with the impact of meteorites, various factors have accumulated over the years, and the rocks have gradually turned into tiny dust-like particles.The original topography of the lunar surface also changed accordingly.

Up to now, the surface of the moon has long been covered by a layer of lunar soil composed of fine sticky particles with a diameter of less than 1 mm. The thickness of these lunar soils varies across the moon, and the thinnest places are only a few centimeters.There are five or six meters thick.

Don't underestimate the lunar soil. If it is brought to the earth, every gram of lunar soil is worth a thousand gold.

除了用于科学研究外，月壤中还拥有丰富的氦3资源。据估算，月壤中氦3的总量便可以达到100万到500万吨。如果用氦3进行核聚变反应发电，100吨氦3就可以满足全世界一年的发电需要，月球上的氦3总量可以供人类使用上万年。

In addition, metal resources such as titanium, iron, and cerium on the moon are also extremely rich.If humans build factories and bases on the moon in the future, they will provide sufficient material support for human lunar cities.

It’s no wonder that the steel penny often says that the solar system in which humans live is too wonderful for low-level civilizations. The eight major planets can provide sufficient mineral energy support for humans to develop the solar system, and the moon is a stroke of genius from the Creator.

To some extent, the moon is as important to life on earth as the sun.

Without the Moon, the Earth's axis of rotation would wobble much more than it does today.This has led to great instability in the current regular four seasons, resulting in global climate disorder, which is very unfavorable for the evolution of life.

The gravitational force of the moon causes the ocean to generate tides, prompting the earth to flood the warm sea water from the equator to all parts of the world. We know that life was first born in the ocean, so tides are very important for the evolution of life from marine organisms to land organisms.At the same time, the warm sea water can accelerate evaporation after spreading to all parts of the world, which promotes more abundant rainfall on the earth's continents, and also makes the global temperature more balanced, providing a decisive guarantee for the survival of land organisms later.

More importantly, the existence of the moon has blocked the intrusion of a large number of foreign meteorites for the earth.Among them are those asteroids that have wiped out life on Earth.

Such a unique condition.It has created the rich and colorful life environment on the earth today.

"Old Dou, look over there!"

The steel hammer jumped back to Chen Xin's shoulder, and pointed to the towering ring-shaped mountain road thousands of meters away.

This crater is extremely large, with a height of at least 3000 meters.When viewed from the sky, it has a diameter of more than 60 kilometers.I don't know what kind of stalwart power it is to create such a miracle.

However, Chen Xin and Gang Yan didn't pay attention to the crater itself. Their attention was firmly attracted by the giant spaceship that was clearly a creation of an alien civilization lying outside the crater.

Chen Xin swallowed, his eyes widened.

The spaceship is half in length, but its length has reached seven or eight kilometers, and its diameter is more than two kilometers.

Its surface glows with metallic luster, clean as new, and thousands of years have not left any traces on it.

"Steel, I'm afraid such a spaceship can hold the 70 billion people on Earth!" Chen Xin murmured.

Steel Iron quacked and said with a smile: "Old Dou, it's just a satellite-class spaceship. It's not a big deal. I can build it when I reach the third-level civilization. This kind of spaceship is not considered to be a fifth-level civilization. What."

"Satellite-class spaceship?"

Chen Xin thought for a moment, then asked: "Gangbi, I remember you mentioned star-class spaceships and river system-level spaceships before. I don't know what these spaceships mean?"

Steel Iron quacked and said with a smile: "Old Dou, this is actually very simple. Different levels of spaceships represent the sizes of spaceships that civilizations of different levels can manufacture. From the lowest level of meteorite starships to the highest level of river system level spaceships, there is no One exception."

After a pause, Steel Tong said again: "Generally speaking, there are seven levels of spaceships from low to high, namely meteorite level, asteroid level, satellite level (dwarf planet level), planetary level, and dwarf star level. Class, stellar class, river system class... Among them, the size of meteor class spacecraft ranges from 100 meters to several hundred meters, which can be manufactured by a second-level civilization. Like the International Space Station in Earth's low-Earth orbit, it can be regarded as a ship. Meteor-star spacecraft, our Dream, is also a meteor-star spacecraft. Of course, the combat power of meteor-star spacecraft manufactured by different levels of civilization is completely different. The size of asteroid-class spacecraft is generally between one kilometer and two kilometers. Between kilometers, such a spaceship can only be built by a third-level civilization. The satellite-level spaceship is about ten kilometers away, and this kind of spaceship is regarded as the top combat power of the third-level civilization. As for the planetary-level spaceship, it is the size. The [-]-kilometer big guys, they belong to the battle fortress of the fourth-level civilization. The dwarf star-class warship reaches the [-]-kilometer level. This kind of spaceship can easily destroy the solar system. However, in the "Cosmic Civilization Convention" , the major intelligent civilizations are strictly forbidden to attack the stars, so you don’t have to worry about it, old man.”

Chen Xin was a little frightened, and asked, "What about the star-class spacecraft of the sixth-level civilization and the river system-class spacecraft of the seventh-level civilization?"

Steel's tone gradually became serious: "The materials required for these two levels of spaceships are extremely expensive, so civilizations of levels six or seven can generally only pick up ready-made ones for modification."

"Off the shelf?"

Chen Xin didn't understand.

Gangzhu smiled and said, "Old Dou, what do you think is the strongest material in the universe?"

Chen Xin hesitated for a while, and asked tentatively, "Could it be neutron material?"

"Not bad!"

Gang Beng nodded and said: "So the He system-class battleship of the seventh-level civilization is actually a neutron star. This level of spaceship can be said to be the overlord of the entire Virgo supercluster. It is also extremely difficult for the seventh-level civilization to manufacture. , It usually takes tens of thousands of years and countless resources to successfully modify one. As for the sixth-level civilization, they can't even hurt a single hair of the neutron star, so they can only retreat to the next best thing and modify the white dwarf. "

Chen Xin was so fascinated that he suddenly thought of a question and asked in confusion: "Gangyi, I remember you mentioned before that Cybertron, the home planet of your Vajra clan, is a neutron star. Are you only a seventh-level civilization?"

Gang Bian shook his head and said, "I don't know about this either. After all, I have only reached the seventh level at the highest level, but one thing is for sure, the Vajra clan is definitely not only at the seventh level."

"why?"

"Because even a seventh-level civilization cannot change the appearance and shape of a neutron star. And Cybertron, it is square." (To be continued~^~)