A hundred years ago, if people were to be asked, what was the greatest project in the history of mankind?

Someone will answer the pyramids, someone will answer the Great Wall, and some will even say the International Space Station. Pen ~ fun ~ pavilion www.biquge.info

There are so many projects that are of great significance to mankind that they can be called great, so there are all kinds of controversies.

In this era, there may be controversy about the second greatest project, but there is no dispute about what the greatest project in human history is.

It is not the pyramids or the Great Wall of China thousands of years ago, nor the Yao-5 observatory and the circumlunar particle accelerator with a diameter of 120 kilometers under construction, or even the "Tree of Civilization" and the "Stairway to Heaven" in the Prometheus project.

Everyone will only say one answer, and that is "Heavenly Palace"!

At least until Arashiya's "Lighthouse Project" was implemented.

In fact, although the Heavenly Palace has been put into use and has been inhabited by 5 million people, it is still in an unfinished state.

When Tiangong was first built, it was just a small cylindrical space station with a diameter of 500 meters and a length of 625 meters, and it was not even as large as the current "Nantianmen" space station.

It is built on the moon and then launched separately to the Earth-Moon Lagrange point L1 to complete the assembly.

After that, the materials that were continuously transported from the moon were used as a basis for this space station to be processed into components for a larger cylindrical space station that was directly and twice as long in length, and when this new "cylinder" was completed, it was used as a new space factory to continue to manufacture larger "cylinders".

This process has now been completed 6 times.

This means that there are seven cylinders, one on top of the other, and each new cylinder is twice as large in diameter and length as the previous one.

Today, the largest "cylinder" has a diameter of 32 kilometers and a length of 40 kilometers.

The final plan for the "Heavenly Palace" is to build nine "cylinders" together, which are nicknamed the "Nine Heavens Project", and when all are completed, it will have a diameter of 128 kilometers and a length of 160 kilometers.

It's almost an asteroid!

But this is not something that can be done in a short period of time.

The "Heavenly Palace" was so big that the weight of the seventh layer alone reached 1.2 billion tons.

It's easy to build a massive structure with 10 billion tons of mass on the surface of a planet with today's technology, but it's a whole different to send that much mass into space.

Although the daily capacity of the spacecraft traveling between the Moon and the "Heavenly Palace" is more than 30 times the capacity of all the space elevators on Earth combined, it still took five years to build the seventh floor.

If this rate of construction continues, the remaining two larger floors will be built for 100 years.

That's why it's only planned to build 9 floors, and if you want to build a 10th floor, it's more than 400 years old.

Compared with the remaining two floors, the construction of a direct 800-meter "South Heaven Gate" could not even use up the leftovers, in fact, when the 12 "South Heaven Gate" were built for the earth, it took a total of only 20 days, an average of less than two days.

Of course, those 100 years are built at the same construction speed, in fact, every time Space City expands, the ship factory will be moved to the outermost floor, because the area is larger, and the construction speed will also increase.

But even so, it will take at least 30 years to complete the construction of the entire "Heavenly Palace".

Each cylinder of the "Heavenly Palace" has its own power, and it can even be said that each cylinder is a spaceship when taken out individually.

Even if the earth and the moon suddenly disappear one day, it has the ability to carry the rest of the people to talk about the continuation of human civilization.

If all the construction is completed, then the "Heavenly Palace" will be able to accommodate up to 500 million people living in it.

The "Heavenly Palace" is located at the L1 point of the Earth-Moon Lagrange, and is the only way from the Earth to the Moon.

However, point L1 is not a stable point of gravitational equilibrium. Especially in a space city with such a large mass, there are constantly spacecraft taking off and landing, of course, it is impossible to stop stably at the Lagrange L1 point, as long as there is a slight deviation, this deviation will continue to expand.

In order to keep the position of the "Tiangong" at the L1 point, these cylinders must constantly adjust their orientation, but this acceleration is not large, and it is completely negligible compared to the centrifugal force simulated by the rotation.

On the other hand, because the orbit of the Moon is an ellipse, the distance between the Lagrange point L1 and the Moon is also changing, which is why spacecraft are used to transport materials instead of a space elevator between the Moon and the "Heavenly Palace".

The seven floors of the "Heavenly Palace" have their own plans.

The outermost seventh floor is the Ship Factory, where all of humanity's large spaceships, including the components that make up the eighth layer, as well as the "South Heavenly Gate", were built.

The sixth floor is the living quarters, where most of the people in the "Heavenly Palace" live.

The fifth layer is the spacecraft docking area, where all the spacecraft that travel between the Earth and the "Heavenly Palace", as well as the spacecraft that travel between the "Heavenly Palace" and the Moon in addition to transporting lunar supplies, as well as all kinds of spacecraft waiting to fly to places including Mars, Jupiter, Venus, Mercury, the asteroid belt, and even the outer solar system.

The ship is docked to the inner wall of the cylinder, and while any layer can theoretically be used to dock the ship, only the fifth layer can be used for maintenance, propellant replenishment, and so on.

The fourth floor is also the living quarters, but the area is smaller, and only 200,000 people live here.

The third layer is the industrial zone, where the lunar specialties that Lu Ze ate before are produced, and here are all kinds of daily necessities that meet the needs of people's daily life.

The second layer is the scientific research area, which is the scientific research center of the entire moon, although the area is not large, but because the main scientific research facilities of human beings are built on the moon, in terms of scientific research strength, especially in cosmology, physics and spacecraft design, etc., the second layer of the "Tiangong" with a diameter of only one kilometer is even stronger than the scientific research strength of the entire earth combined.

The first layer is the TY zone, and unlike all the other hollow cylinder structures, the first layer is a solid cylinder with a direct 500 meters.

It is home to the most advanced supercomputer in the world, Tian Yuan.

Of course, it is impossible for a single supercomputer to be this large, and it also includes various supporting facilities, including two fusion power stations dedicated to supplying energy to Tianyuan.

This starts with the limitations of the Star Spirit Network.

The predecessor of Xingling Network is the Earth Neural Network, and its English name is planeuralworks, which is translated into Chinese as "planetary neural network". The name Star Spirit Network also comes from this, although the technology has been updated, but the Star Spirit Network is still limited to one planet.

Although the Moon is a satellite of the Earth, they are separated by 380,000 kilometers, and the transmission of information between the Earth and the Moon not only has the problem of delay, but also the problem of bandwidth, which cannot fully meet everyone's communication needs.

As a result, between the "Heavenly Palace" and the Moon, an independent Star Spirit Network is formed that is independent of the Earth's Star Spirit Network.

It's called Tianyuan.com.

Tianyuan.com uses the same rules as Xingling.com, and for individuals, they can't even feel the difference.

The Earth's Star Spirit Network uses all the computing devices distributed in every corner of the earth to form a huge network of neural computers, so as to obtain unparalleled computing power and intelligence.

The biggest difference between Tianyuan.com and Xingling.com is that Tianyuan.com is built with the supercomputer "Tianyuan" as the heart, and all information is processed by Tianyuan in a centralized manner.

This is a completely different system from the Earth's Star Spirit Network.

Its advantage lies in its ability to better coordinate between all spacecraft and the Tianyuan Network.

Otherwise, according to the Earth's model, once the spaceship is far away from the Earth, the delay caused by the distance will cause the Star Spirit Network to not work at all.

This is a change made to adapt to the development of human beings in space.

In fact, when Lu Li couldn't play the game because of the delay, she was no longer connected to the Star Spirit Network but to the Tianyuan Network.

After four hours of sailing, the spacecraft finally arrived at the "Heavenly Palace".

From the time Lu Ze and the others decided to go to space, to the time they arrived at the "Heavenly Palace", it only took a total of 12 hours to count the waiting time during the period, which is not a miracle.

At this time, the spacecraft has just sailed into the outermost cylinder range, looking out through the window on the side of the spaceship, the front and back are layer after layer of arc-shaped inner wall of the space city, its structure is very simple, just a set of cylinders, but as the so-called, do not know the true face of Lushan, only because of being in this mountain, when in it, at a glance, it actually makes people have a sense of spatial disorder, as if the whole world is occupied by this "heavenly palace".

Although these cylinders rotate at different speeds, they are also connected by elevators.

The method of connection is to coat a ring with the same rotation speed as the outer layer of cylinder on the cylinder, and the elevator of the outer layer is connected to this ring, and when the elevator reaches the ring, it will move horizontally along the ring until it is the same as the rotation speed of the inner layer of cylinder, and then enter the inner layer.

At this time, Tianyuan informed them to sit back in their chairs.

When everyone was seated, the spacecraft began to land slowly, and at the same time as landing, the spacecraft began to move in the direction of the rotation of the cylinder on the fifth floor, and only after reaching the same rotation speed as the cylinder on the fifth floor, the spacecraft stopped steadily.