Chapter 501 (1/2)

Of course, in the past three years, although human civilization has been making every effort to build the Earth Defense circle, there is still a long way to go before the construction of the whole Earth Defense circle is completed, because according to the plan of the Earth Defense headquarters, not to mention others, only the earth low earth orbit defense facilities, that is, the space station with a tonnage of more than 500 tons, After completion, the number will exceed 5000.

This is only a space station in low earth orbit. In addition, there will be more than 1000 military space stations in medium earth orbit with a tonnage of more than 500 tons, and more than 100 large military space stations in high orbit and geostationary orbit.

So now it seems that they have built many large space stations, but compared with the whole plan, this is only the beginning. According to the plan of the Earth Defense Command, so many space stations and earth civilization will be built within the next six months. Therefore, such pressure is still very great for the whole human civilization.

Of course, in addition to the construction of defense facilities outside the earth, the construction of ultra long-range defense facilities on the earth has not fallen behind. However, due to the limitations of human civilization and science and technology, only beam energy weapons, such as lasers, are available for ultra long-range attack weapons, especially those from cosmic threats.

In addition, only those super large rockets that can launch deep space exploration spacecraft also have certain attack capability.

Therefore, since the establishment of the Earth Defense Command three years ago, the whole world and the whole human civilization have also seen a thriving situation. Except for the uncivilized areas on the whole earth, wars have been basically eliminated in other areas, because we all know that compared with the threat of alien civilization and the huge interests in the universe, This tiny benefit on the earth can't get into their eyes.

What's more, if someone in the whole Earth Defense Command Center dares to launch a war on earth, his voice in the Earth Defense Command Center will be weakened. Even being replaced by others is something they absolutely don't want to see. You know, it's related to their future development and interests.

Such huge and numerous projects have naturally greatly stimulated the earth's economy. Most companies make a lot of money, including Tiangong technology.

Because Tiangong technology is the most advanced enterprise in aerospace technology on the whole earth, naturally many products are unique and indispensable. For example, the pulse detonation rocket engine of Tiangong technology is one of them. If there is no pulse detonation rocket engine of Tiangong technology, then, In the past three years, there will not be so many space planes on earth, and many space stations in natural earth orbit can not be built.

In addition, there are some materials of Tiangong technology, especially special high-temperature resistant glass, which is also one of the necessary materials for manufacturing aircraft. Although many other space agencies on earth also have high-temperature resistant space glass, compared with this special glass of Tiangong technology, the performance of these space glass is far worse. Of course, they can be sold to their special glass, Tiangong technology or Huaxia is already very backward. They are the first generation products of sky technology. After all, the most advanced products can not be sold to them. Unless one day the whole earth civilization has been integrated into a big family, and there is no division between countries, at that time, Tiangong technology will naturally lift these restrictions, It's just impossible now.

Of course, at this time, the volume of multiple space stations in earth orbit is very large, so even the people on the ground can clearly see the existence of these space stations. Therefore, people on the earth have been used to the existence of these space stations, and people are more clear about the coming of the cosmic age, Therefore, even if the major in space has been expanded to 200% or more, but even so, the relevant majors in Colleges and universities are full year by year.