Anomaly Within the Oort Cloud

Of course, while human civilization was devoting all its efforts to transforming Mars, it also began exploring the entire Solar System and the regions surrounding it, even dispatching probes to star systems near the Solar System.

At the same time, construction of humanity's defensive perimeter within the Solar System had not stopped. Instead, work began on establishing a more comprehensive defense network. Previously, humanity's defensive perimeter had basically been confined to the inner Solar System within the Asteroid Belt. As for the outer Solar System beyond the Asteroid Belt, human civilization had been unable to do anything at the time due to its technological limitations and the Alien Civilization fleet, and could only abandon it.

Things were different now. After more than a decade of development, human civilization's spaceflight technology had advanced to a new level. Moreover, the Alien Civilization fleet had now been defeated, so naturally, humanity would not give up on the outer Solar System.

After all, the universe was not peaceful. Alien Civilization fleets could appear beyond the Solar System at any time and pose a threat to human civilization at any moment. Humanity had suffered a loss before because it had failed to take this seriously. Fortunately, the Seven Color Stone Group had existed, allowing human civilization to survive. Without the Seven Color Stone Group, no one dared imagine whether human civilization would still exist.

Therefore, both Zhang Yi and the upper echelons of human civilization attached great importance to the Solar System's defensive perimeter.

However, compared with the defensive perimeter in the inner Solar System, building one in the outer Solar System was far more difficult and required much more time, manpower, and resources.

According to Zhang Yi's calculations, merely establishing bases on the satellites of the Solar System's major planets would take at least