Chapter 51

Li Zhendong heart surprised, but look at Zhang Yuan's face, should not be in nonsense.

What's more, working on a project with a university professor sounds much more reliable than his "game".

Inexplicably, Li Zhendong wants to take refuge in the other side.

However, he can't be shameful at all!

And he said, "where's the paper? Have you ever thought about it? I'm going to take a postgraduate examination on the spaceship. Undergraduates like us may be at the bottom of the society. It's miserable. "

“…… I should have passed the GPA and passed the postgraduate examination, but I don't have a particularly good thesis. Where can I get a good thesis from an undergraduate annoying! My father is too lazy to guide me

Zhang Yuan scratched his head and didn't know what to say.

If his paper is successfully published in modern science, as long as the written examination results are acceptable, generally speaking, there will be teachers asking him.

It's not bad for an ordinary university professor to publish one article in a district Journal of modern science.

"Do you have a good idea of what major to study for graduate students?" Zhang Yuan was a little embarrassed, "I have submitted a paper to modern science. If I can publish it, I should be able to add some interview points."

"What, modern science, you?" Li Zhendong was stunned again and couldn't react for a while.

Just as they were chatting, the girl's shrieks came from the next room.

"The sun

"What a beautiful sun

It's the sun rising from the horizon.

When you see the sun at an altitude of several hundred kilometers, you will find that it becomes extremely bright.

The position of the sun became very accurate, without any halo, emitting dazzling and domineering white light.

Without the shielding of anti radiation materials, this solar radiation can easily sunburn people, and even damage the DNA of human cells, causing permanent damage.

Because of this, the human astronauts of the old age were not allowed to go to heaven before giving birth. However, with the improvement of anti radiation materials from generation to generation, there is no such regulation.

There are several dark clouds under the explosion of lightning, flashing like a blooming carnation. Sometimes you can see lightning from different clouds in five or six places, illuminating the whole cloud.

These views are invisible on the ground.

The girls screamed excitedly: "these clouds are so small. They are different from what we saw on the plane."

"It must be different. The plane is only a few thousand meters high..."

"It's like a cotton ball exploding!"

"If we really fall from this height, we will become a fireball, just like a meteor. It's burning alive, not falling! " One boy threatened very badly, "can you imagine turning into coke?"

"Ah

The chirping and shouting, together with all kinds of panic screams, made Zhang Yuan laugh uncontrollably.

Maybe, when he took the space elevator for the first time, he was in the same mood.

In the next few hours, with the increase of altitude, we can see the whole face of the eastern hemisphere.

The snow in the Himalayas is vast and desolate; the reddish brown whirlpool on the Carvel desert carries a kind of primitive mystery; the forests of Southeast Asia archipelago shine like emeralds

It's exciting, it's really exciting!

Overlooking the whole earth, there is a sense of "the world is in my hands".

The vast earth, as shown in the picture, floats quietly in the universe.

The earth is really round, visible to the naked eye.

The current altitude is 600 km.

According to a scientific survey, at this height, more than 90% of people will have unparalleled admiration for natural science, motherland and space elevator.

The earth is big, too big!

Even the octagonal building, the largest building of mankind, is just as insignificant as ants.

But little human beings, from this angle, can easily see every trace of the earth!

This strong contrast has another visual impact. Looking down like a God, everyone has a strange pride. The whole world has been trampled under their feet.

Human beings have developed to such an extent that the tower of Babylon, which leads to the boundless sky, is extremely powerful against nature. Really, really it is beyond logic and above reason!

What is global travel compared with space travel?

Hearing the exclamation of the passengers, Zhang Yuan sighed: "it's nice to be young."

Li Zhendong nodded and agreed: "too young, too native."

The girls next door are still chirping and excited. They are looking for famous buildings and natural landscapes on the surface.

"It should be Donghua city..."

"Is that the imperial capital?""That mountain is Mount Everest, isn't it?"

"No, it should be Namjagbarwa."

"Well, it should be curved island..."

It's a pity that the Great Wall, one of the seven wonders of the world, can't be distinguished by the naked eye.

But with Warwick's p888 mobile phone, we can photograph the Great Wall.

There are also several broad asphalt roads, because of the sharp contrast with the surrounding environment, you can see them vaguely, just like hair.

The girls were talking excitedly, taking pictures, cheering and cheering.

……

After a few hours, the tourists finally lost interest and calmed down again. There is no network, and there is no way to send a circle of friends. With interest, but no way to share, it is simply suffocating.

"That Handsome

Zhang Yuan and Li Zhendong looked at each other.

What about me?

It's me!

“…… Handsome guy, are you that, that Zhang Yuan? The one who donated money! You are an astronaut The other side seems very excited.

Zhang Yuan touched his head. Has he become so famous?

The girl on the other side looked at him and said excitedly: -- At that time, I was just watching the live broadcast. I didn't expect you to be an astronaut. Don't you want to stay on earth and enter the entertainment circle? "

"When did I say I wanted to enter the entertainment industry? I never planned to... " Zhang Yuan coughed and replied, "I will follow the spaceship and leave the solar system."

"I knew it! The son of a great scientist, how can he do that boring trick. Ha ha, I'm not saying that it's bad to be a star. It's just that the social value created is certainly not as good as scientists. Can I send a circle of friends to clarify this fact? "

"Send it, it doesn't matter."

The girl ordered her cell phone and found that there was no Internet, so she had to give up.

She seemed to see that Zhang Yuan was a little embarrassed and asked a good question again: "well, I have a question for you. What are the ring-shaped and bright devices outside the window?"

Zhang Yuan replied, "that's an ion propulsion device. When we reach geosynchronous orbit, the linear velocity is about 3.1 kilometers per second. This part of the lateral linear velocity is provided by the electric propulsion engine, which can reduce the lateral deformation of the elevator track. "

"Oh..." Girls don't understand.

Zhang Yuan smiles.

In fact, there are more ion engines on the "Tenglong" space city to maintain the orbital height of the space city.

Think about it, people go to pull a hydrogen balloon, get upward pull, hydrogen balloon will be subject to reaction force, that is downward pull.

In the same way, when the cargo elevator climbs up the cable track, it will lower the height of the space city. Therefore, we must rely on the injection of working fluid to push the space station to the synchronous orbit again in order to maintain the dynamic balance.

Even if the space elevator has been built, we still have to use the working fluid to maintain the balance. What a tragic thing.

But this is the best way to climb the gravity well. Who calls the space elevator not a rigid body?

Human technology, in fact, is far from as superb as imagined.