People have to die compared to people, goods have to be thrown away, and the productivity gap between the two sides cannot be smoothed out in a day or two, but fortunately, Leon is also a member of the Earth camp, but it did not make the members of the Planetary Defense Committee too desperate.

After the report of the commander-in-chief of the fleet, the next step is the head of the planetary defense platform in the low earth orbit plane.

"The United Space Station has started the third phase of the expansion project, which is expected to accommodate up to 100,000 people.

The multi-functional ship platform is about to be completed, and the space mining, smelting and other industrial sectors built around the space station will gradually increase production capacity within two quarters to meet the needs of the space station's further self-expansion.

This construction process requires the cooperation of major multinational organizations, not only military factories in various countries, but also private enterprises such as Hyundai Heavy Industries, Mitsubishi Heavy Industries, and Daewoo Shipbuilding have begun to accept orders to build some civilian-grade starship parts on the surface.

At that time, the Earth shipyard will not need to complete the splicing of the ship on the surface, but only need to produce the ship's parts, and then cooperate with the space elevator program to complete the splicing on the ship platform in low earth orbit. ”

The so-called low-earth orbit surface defense platform is actually a super-giant space station built in Earth orbit.

The poverty alleviation project of the Zitari people has brought many emerging technologies to the earth, including more advanced metal materials science and biomaterials.

With the help of these two materials sciences, geoscientists have successfully identified carbon nanotubes with higher strength, and based on these carbon nanotubes, a space elevator program has been developed.

The space elevator is located in Equatorial Guinea, Africa, and the main body is a giant cable with a total length of 3.6 kilometers composed of several coarse carbon nanotubes with human arms.

One end of the cable is fixed to the surface, and the other end is connected to the space station in low Earth orbit.

The space station is in geostationary orbit and orbits the Earth at an angular velocity of 7.27×10-5 arcs per second, which is exactly the same as the Earth's angular rotational velocity, so from a distance it appears as if the space station is stationary.

The angular velocity is the same, so that the cable will not bend when it is not affected by external forces.

According to this nature, the capsule containing the cargo can be fixed to a cable and be "pulled" slowly into space like a normal elevator.

In the past, it used to cost about $20,000 per kilogram of payload for a rocket launch or space shuttle, but with a space elevator, that price can be reduced to several dollars.

Moreover, the emergence of space elevators will greatly reduce the burden on the shipyards of the earth.

If the shipyard manufactures the parts of the ship first, then assembles it on the surface, and finally launches the ship into space, then the spacecraft must consider factors such as the earth's gravity, air resistance, and thrust-to-weight ratio, and the design will be affected.

However, if the spacecraft parts are taken to outer space and spliced together in a gravity-free environment, then such a spacecraft does not need to consider these two factors at all, and the design can be more free.

Larger in size, heavier in armor, more turrets, more firepower, and a spaceship that doesn't need to be bound by gravity or air resistance, it can even be described as "weird".

Spaceships can be cylindrical cigars, long pistols, falcons, human heads, or even the Armstrong Armstrong Boom Gun (a vertical cylinder with two balls on either side), which has been passed down from generation to generation by the Armstrong family.....

According to the Zetarians, the vast majority of galactic civilizations will set up spaceship construction factories in outer space, and the vast majority of spaceships do not even need to be close to the surface of the earth in their lifetime, even if they replenish supplies, they only need to go to the space dock in the planet's orbit to procure.

More importantly, the space elevator and the joint space station can win a more precious resource for mankind - time.

No one knows when those alien ships will arrive, next year, next month, next week, or even the next second.

All the Planetary Defense Committee can do is accelerate as much as possible and increase the odds of victory for all of humanity - even if it's just a 0.0001% chance to 0.001%.

After the head of the planetary defense platform completed the report, some other department heads also made reports.

On the whole, humanity is thriving, and the efficiency of national mobilization that has erupted at this stage has surpassed the efficiency of the bipolar struggle for hegemony during the Cold War.

"You're doing a great job,"

Li Ang, who was sitting behind the conference table, nodded, looked around, and said indifferently: "By the way, what do the Zitarians say?" ”

The Alien Civilization Liaison Officer hurriedly replied, "According to the covenant we signed before, the Zetarians will deploy defenses outside the solar system, ready to help us deal with the invasion of alien civilizations.

They claim that despite the size of the alien civilization's coalition forces, the Zetarians will not betray their allies. ”

"Huh,"

Li Ang raised his eyebrows and asked with a smile, "So, have they contacted you and asked to open the wormhole that connects to the Zitari home planet again, so that more supplies can be transported from the Zitari home planet?" ”

"Nope." The liaison officer shook his head and said, "They claim that the Zetari fleet wandering in the solar system has long been prepared to sacrifice, but they don't want the forces of the alien alliance to track down the location of their home planet and take revenge on their civilization. ”

Speaking of which, the atmosphere of the meeting was depressed again, although the participants were a little moved by the indefatigability of the Zetari people,

But anyone can see that even the Zetari civilization, which is far more developed than humans, has to survive under the oppression of the alien coalition.

So, how strong will those alien coalition forces be? What will be the fate of human civilization?

"Don't be too anxious to be moved, if there is a chance, those Zetarians will definitely turn their guns as soon as possible and destroy the human race before the arrival of the alien coalition, as a petition to invite credit and apology,"

Leon was not moved by the self-sacrifice of the Zetarians in the slightest, not my race, their hearts must be different, the Zetari fleet in the solar system was only forced by the situation, not at all how close it was to the earth civilization.

"Even if they build fortifications outside the solar system, no one can guarantee that the Zetarians will not do anything about the fortifications, such as sending quantum communications in real time to tell the alien fleet the specific location of the Earth and the political situation.

You also have to keep an eye on it to prevent the Zitarians from turning back at a critical time. ”

Leon commanded, and at the same time stood up and said seriously: "For the time being, we still need the Zetarians to gather information for us, and at the same time, I also want to tell you some bad news. ”

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