All the solid matter was placed in the central space. This solid matter would be the starting point of the new Sun. The work that followed was easier. This solid matter was scattered haphazardly over an area of hundreds of thousands of kilometers. It was surrounded by encapsulated gaseous matter. Academician Zeng had improved a giant gravitational bomb.
This gravity bomb won't explode, but it will continuously release powerful gravity, attracting surrounding matter. Once the mass of the matter reaches a certain level, it will generate enough gravity that the gravity bomb will no longer be needed; the matter will attract distant matter on its own.
Three months later, a giant planet appeared. To be precise, it wasn't a planet yet, because the solid matter attracted by the gravity bomb wasn't a sphere, but a very irregular and chaotic pile of matter.
Six months later, the mass began to shrink under its own gravity, and the core temperature began to turn the solid matter into a red-hot liquid. The fleet carried the nascent planet, giving it a high-speed rotation period of one revolution per minute. This was the fastest speed it could go; any faster and the planet would disintegrate again.
Planetary rotation not only allows it to rapidly attract surrounding matter, but it also gradually makes the planet itself more rounded. Now its surface is covered by a thick atmosphere, and surrounding gas continues to fall towards it, forming a huge spiral disk. Over time, this planet will become larger and heavier.
With the constant intervention of the fleet, in just ten years, the core temperature of this planet reached tens of millions of degrees Celsius, igniting its interior and releasing tremendous energy. The fleet continued to send gaseous matter from the surrounding airspace towards the center, increasing its mass. As time went on, the temperature of its core increased, and its appearance became brighter and brighter, until one day, the star appeared white from a distance, and its mass reached the size of the Sun. At this point, its rotation speed had slowed to one revolution per month.
The fleet intervened again, adjusting the star's rotation period to 20.5 days. Finally, the new Sun was born completely. Hu Yu chose the most complex star-making method, with most of the material coming from the original Sun. Perhaps this can be considered the Sun's rebirth.
The newborn Sun slowly rotates on its original coordinates, once again selflessly casting its light and heat into the distance, and the dilapidated, lonely, and cold Solar System is revitalized.
Although the Sun is the largest, its reconstruction is the simplest. Planets, though small, are hundreds or thousands of times more difficult to restore to a one-to-one scale than the Sun.
Earth, in particular, has a variable climate, a complex environment, and the richest material structure. In addition, the academicians have limited data, making restoration even more difficult.
Despite the difficulties, everyone worked tirelessly to restore Earth. Although the task was neither urgent nor particularly important, all the scientists involved put aside their other work and devoted themselves to the restoration day and night, as if the army of the Fish Horse Star Civilization were pressing in.
Material from the distant Oort Cloud was continuously transported by transport ships to the vicinity of the new Sun. This material was sorted and organized, with enough of each element to build several Earths.
However, the Earth is composed of more than just elements; it consists of various compounds with molecular structures. This list has been compiled and contains tens of millions of different compounds. Although the fleet has been synthesizing various compounds for the daily needs of the people, the amount used by the people is vastly different from the amount needed to restore the Earth.
Fortunately, the alliance has many members, and they are very concerned about humanity's work in rebuilding the Solar System. After learning that humanity needs compounds, these civilizations moved all the machines for synthesizing various compounds to the Solar System, using the materials of the Solar System to create various compounds needed by Earth.
In the fleet's supercomputer, a blue and white sphere was simulated. Enlarging the sphere, the Yangtze River and Yellow River roared and rushed towards the sea; the Great Wall, a marvel of human architecture, stood winding and majestic atop the mountains; Mount Everest, the highest peak on Earth, was covered in snow, and a biting wind blew; the Sahara Desert was being scorched by the blazing sun; a group of adorable giant pandas frolicked in the bamboo forests of Jiuzhaigou; and a group of blue whales spouted water columns tens of meters high over the expansive Pacific Ocean...
From towering mountains and rivers, deserts and deep forests, to every recorded mountain stream and every flower and grass, everything is presented in this computer-simulated Earth. The only thing missing is human architecture; only a small number of human wonders have been restored, such as the Great Wall and the Beijing City.
After a long period of simulation, the climate conditions have basically reached the state before the insect swarm invasion. The data is mature, and the next step is the reorganization of matter. Although the Earth's core simulated by scientists may be different from the original Earth, the actual effect is already consistent with the original Earth. Whether it is the magnetic field, gravity, geothermal heat, etc., they have completely reached the conditions of the original Earth.
The only difference from the original Earth is that the New Earth has many cavities 100 kilometers below the surface. These cavities will be covered by the Fifth Reversed State to form refuge spaces. Although Hu Yu hopes that these underground cavities will never be used, it is always better to be prepared.
The robots resumed their busy work, meticulously piling up the various substances and compounds that had already been categorized according to the computer simulation of Earth's composition. The precision of this piling up needed to be accurate to the gram. Countless robots moved back and forth, working tirelessly day and night, like ants carrying food.
Finally, 20 years later, a rough, pear-shaped planet was built. The robots stopped working, and transport ships began to land on this somewhat ugly planet, dumping large amounts of water onto the surface. This water also came from the Solar System. The Solar System is not short of water, and with the fleet's advanced technology, it was not difficult to bring this water to Earth.
With water, plants can now take root. The fleet has stored seeds of all the plants on Earth, and there is no shortage of plants in the fleet. Almost all Earth plants can be found on the inhabited planets, as can animals. The inhabited planets are teeming with cattle and sheep, chickens and ducks, and all kinds of birds, beasts, insects, and fish. Now, all that needs to be done is to transfer these plants and animals to Earth.
With the injection of water, in just two years, the New Earth began to take on its original appearance. Sunlight helped the water vapor evaporate, and torrential rains fell across the Earth. Rivers began to flow, and a thin layer of glaciers began to cover the mountains. The poles were already frozen. However, the Earth's climate was still quite harsh, and it would take at least several decades to gradually return to calm.