A big country of aerospace with black technology

Electromagnetic acceleration orbits are used far more widely in space than on the ground.

The Earth's surface is severely affected by gravity.

Even if materials science is developed to its limit, it will be difficult to build an electromagnetic acceleration orbit dozens of kilometers high.

It is difficult for the intermolecular forces of materials to withstand the burden of gravity.

In fact, some people have long proposed building electromagnetic launch orbits on the ground.

Used to reduce the launch costs of traditional chemical fuel rockets.

It is envisaged that tens of kilometers will be dug underground.

Build an ultra-long electromagnetic acceleration launch tube.

Combined with powerful nuclear reactors and superconductors, extremely powerful magnetic fields can be created.

At the same time, an axial propulsion force is generated in the launch tube.

The long acceleration process can make the launched object reach more than 30 times the speed of sound.

Far exceeding the first cosmic speed away from gravity.

The idea is beautiful, but the reality is cruel.

The engineering construction of electromagnetic accelerating launch tubes is very difficult.

The hardest part is digging dozens of kilometers underground and keeping it straight.

It is more convenient to build an electromagnetic acceleration launcher underground than to directly build a space elevator.

In space, the conditions that restrict electromagnetic acceleration launch tubes no longer exist.

Without the constraints of gravity, the length of the electromagnetic acceleration launch tube can even reach astronomical levels.

In the future, colonization activities across star systems.

It relies heavily on this technology.

An electromagnetic accelerating tube whose length can reach the light-minute level can increase the speed of the spacecraft in the center to one-tenth of the speed of light.

It would only take forty years to fly to the nearest galaxy, Proxima Centauri.

It's a pity that Zhang Xingyang was reborn too early.

When he was reborn, the spaceship bound for the Proxima Galaxy had just set off.

If he lived for another eighty years, he would even be able to see humans coming back from the Proxima Galaxy.

Even if he stays for more than forty years, there is hope that he will be able to receive radio information sent back from the Proxima Centauri galaxy.

"We want to establish scientific research bases on the moon and Mars in the future, and it is impossible to use chemical fuel to propel the spacecraft every time."

Chemical fuel propulsion spacecraft is the most mature aerospace method used by mankind.

The technology is more mature.

But it also has disadvantages, that is, the cost is too high.

If you want to transport one kilogram of material to the space station orbit at an altitude of 300-400 kilometers, it will cost about 10,000 yuan.

It would cost about 30,000 yuan to transport the same weight of material to the height of geosynchronous orbit, where the star port is located.

It would cost about 100,000 yuan to transport the same weight of material to the moon.

As for transportation to Mars, the cost will continue to increase several times.

Not to mention the more distant outer solar system planets, such as Jupiter, Saturn, etc.

In comparison, the electromagnetic acceleration track is considered both technically and economically.

They are all better choices.

"Isn't our moon landing rocket already determined?"

Geng Bo said with some doubts.

If it's just to land on the moon, there's no need to go to all this trouble.

Adding another huge electromagnetic acceleration orbit to the star port will not only seriously disrupt the construction progress.

And there is no benefit in a short period of time.

The time for the moon landing has actually been determined.

It will be one and a half years later, on the 60th anniversary of the founding of the People's Republic of China.

The preparations in all aspects have been sufficient, and even three landing locations have been selected.

The training of astronauts to land on the moon has also reached its final stage.

Zhang Xingyang shook his head, "The electromagnetic acceleration orbit is actually prepared for the subsequent lunar surface base."

"This thing was not needed for the early moon landings."

The previous moon landings were actually exploratory in nature.

It's just like the difference between humans' first landing in space and subsequent landings on the space station.

The previous few moon landings were more about testing related technologies.

"After we start the construction of the lunar base in the later period, large quantities of materials will be transported through electromagnetic acceleration orbits."

Geng Bo nodded after hearing this.

In this way, it is more reasonable.

The construction of a lunar base requires at least hundreds of thousands of tons of various materials.

Even general geotechnical construction materials can be obtained locally on the lunar surface.

But oxygen, steel, and various equipment must be transported from the earth.

By then, the transportation costs alone will far exceed the cost of these materials and equipment.

The electromagnetic acceleration track can effectively reduce the transportation cost of these materials.

"Even if this is the case, there is no space to install an electromagnetic acceleration orbit of this size in our star port, right?"

Geng Bo then raised his own questions.

Although the size of the first phase of the Star Port project has reached several thousand tons.

But it is obviously not enough to support the large-scale electromagnetic acceleration orbit envisaged by Zhang Xingyang.

According to assumptions, its length will reach one light second!

If built, it will be a planet-level spectacle!

The diameter of the earth is only over 10,000 kilometers.

The length of the electromagnetic acceleration orbit will be as wide as more than twenty Earths.

If it were actually built in space.

And it’s not too far from Earth.

Then humans all over the world can see that the sky is divided into two halves by a long line.

However, the electromagnetic acceleration orbit at the light-second level is the final form.

That is used to accelerate spacecraft across star systems.

Within the star system, there is no need for such a huge electromagnetic acceleration orbit.

However, the length of the initial construction has also reached three kilometers.

Slightly smaller than the radius of the star port.

"The electromagnetic acceleration track doesn't need to be too big, it just needs to be inserted into the space between the star port's circular axes."

Zhang Xingyang opened the sketch of the star port on his mobile phone, pointed at the gaps in the middle of each cabin and said.

Most of the cabins are empty.

Not only to leave space for future construction, but also because if they are all built, too many materials will be needed.

Unless they can be the first to complete the development of a space elevator.

Transport supplies from Earth in large quantities.

Otherwise, every kilogram of supplies must be strictly calculated.

Zhang Xingyang called up another temporary sketch he had made before, "We just need to insert these electromagnetic acceleration tracks between the cabins like straws."

Geng Bo looked at it for a while and felt that there was nothing wrong with this design.

But he sighed.

"In this way, Xu Ying and the others will have to increase their construction work a lot."

"Maybe they will be working in space for 200 days a year."

Judging from the current work situation, working only two hundred days a year is absolutely leisurely.

But if you change the working location to space.

Then this is definitely a difficult job.

The low gravity environment of space will have a great impact on the health of workers.

Especially the space engineers who drive engineering spacecraft for space operations.

It is different from the astronauts who conduct scientific research missions inside the space station.

Their living environment is more difficult.

At this time, Xu Ying, who was 36,000 kilometers away in space, did not know that her future workload would suddenly increase significantly.

"Report to the command center that the No. 5 Hall thruster has been installed."

Xu Ying concentrated on completing the installation of the first Hall thruster today and relaxed her mind a little.

"Tiangong-2, according to the observations of the planetary defense system, in one hour, an asteroid with a diameter of 120 meters will pass by your orbit. Please change your orbit in time to avoid it!"

The ground command center sent an early warning message related to Xu Ying's life.

Near low-Earth orbit, there are tens of thousands of asteroids with a diameter of more than 100 meters at any time.

Among them, there are thousands of asteroids above the kilometer level.

Any kilometer-sized asteroid that breaks into the Earth's atmosphere would be a devastating disaster.

The thick atmosphere cannot completely burn these large asteroids.

After passing through the atmosphere, they retain at least 80% of their mass.

The energy released is equivalent to thousands of the most powerful Tsar bombs in history, all released within a range of several kilometers.

This energy is enough to break through the earth and trigger volcanic activity thousands of kilometers away.

Many extinct volcanoes will be reborn due to the addition of this energy.

Within a range of thousands of kilometers, it will be difficult for any living thing to survive.

And their orbits vary and are difficult to predict.

Domestic planetary defense systems spend large sums of money every year in the fields of space optical equipment and supercomputing.

Only then can we barely detect the orbits of most 100-meter-level asteroids.

"Tiangong-2 has received it and is starting the orbit change procedure."

Xu Ying didn't care about rest at this time and directly started to operate the spacecraft's orbit change program.

A 120-meter asteroid may not have much impact on the titanium alloy star port.

But it can definitely destroy the spaceship he is riding on.

If you don’t want to die in space.

He must complete the overall orbit change work within this period of time.

Xu Ying controlled the Tiangong-2 spacecraft and first connected to the Tiangong-1 unmanned engineering spacecraft.

Then the propulsion systems on the two spacecrafts worked together, dragging the larger star port and flying closer to the earth.

An hour later, Xu Ying looked at the asteroid flying five kilometers away from her through optical observation equipment and breathed a sigh of relief.

This is a very common asteroid in space, with a rugged surface glowing gray-white.

"Report to the command center, we are far away from the dangerous asteroid."

Xu Ying reported to the ground command center.

In fact, the probability of encountering an asteroid in space is very low.

It is even much lower than when encountering a car accident on the highway.

Because these tens of thousands of asteroids are distributed in three-dimensional space of tens of thousands of kilometers.

There may not even be one within every 10,000 cubic kilometers.

"When will our energy core and related defense systems be installed?"

"I'm seriously insecure right now."

After Xu Ying finished her report, she complained to the ground liaison staff.

The star port is huge, and it is impossible to change its orbit every time it encounters threats such as asteroids, comets, etc.

So it actually has a layered defense system.

Including powerful lasers, electromagnetic acceleration kinetic energy weapons, automatic attack missiles, etc.

"The launch of the weapon system is of great importance. There are still many unresolved issues. Please be more patient."

The familiar liaison voice did not appear.

The person who answered Xu Ying's question was the commander-in-chief Zhang Xingyang.

Taking advantage of the moment when Xu Ying's mood was ups and downs after she had just completed an orbit change maneuver.

Zhang Xingyang also revealed more relevant information to him.

"In fact, we have basically completed the research and development of the energy core and weapon systems."

"The obstacles we are encountering now are not technical."

In this world, some people seem to exist just to stir up trouble.

The construction of star ports is a good thing for all mankind.

But for some countries, being surpassed by the Dragon Kingdom seems unbearable.

So they almost used all the means at their disposal to stop it.

Whether it is the installation of nuclear reactors or the installation of weapons systems.

They all believe there are major security risks for the world.

Several parties are now engaged in lawsuits internationally to the point where their brains are about to come out.

"Don't worry, after you complete the installation of the temporary propulsion system, you will be able to have a longer vacation."

At the end of the call, Zhang Xingyang brought good news to Xu Ying.

"Xu Ying understands."

Xu Ying didn't say anything more. After ending the communication, she started installing the No. 6 Hall thruster.

If it is the first day into space, Xu Ying still has a strong sense of freshness.

Then by the third day, the novelty is almost gone.

Moreover, he performs the task alone, and loneliness always lingers around him.

Although the communication device can always hear voices that comfort you.

But these people are farther away from me than anyone else in the world.

On the earth, the furthest distance between two people will not exceed 13,000 kilometers.

And now, the human being who is closest to him.

They are the space station astronauts in low-Earth orbit.

But even they are.

There is still a distance of more than 35,000 kilometers from me.

"I feel a little homesick."

After Xu Ying completed the No. 6 Hall thruster, she turned to look at the small blue ball outside the porthole and murmured to herself.

"Finish your work and go back as soon as possible."

"Report to the ground command center that the No. 6 Hall thruster has been installed."

Then the installation work of the No. 7 Hall thruster began.

On the ground, another round of controversy about the star port also began.

"Electromagnetic acceleration orbit, do they have any other opinions?"

Zhang Xingyang browsed the recently sent messages with a dissatisfied look on his face.

Geng Bo was also a little helpless. Some people have really been thieves for a long time, and everyone is a thief.

At the latest press conference on the construction progress of the star port, it was just announced that an electromagnetic orbital accelerator will be added.

Yingjiang questioned whether this technology would become an electromagnetic rail gun.

Will the star port accelerate from the sky through electromagnetic orbit and launch a kinetic energy strike towards the ground?

Because there is almost no upper limit to electromagnetic orbital acceleration and the vacuum environment of space.

The warhead is capable of reaching one percent of the speed of light in space.

A low-light speed warhead strike can wipe out a city on the map with just one shot.

Even the well-informed Zhang Xingyang was shocked when he heard this idea.

He himself didn't expect that he could operate like this.