Wandering Spaceship in Deep Space Chapter 51: Young, so nice

　　 Li Zhendong was surprised, but looking at Zhang Yuan's face, he shouldn't be talking nonsense.

　　 Moreover, working on a project with a professor in the university sounds much more reliable than his "game".

　　Inexplicably, Li Zhendong kind of wanted to take refuge in each other.

　　 But, he can't shame at all!

　　 He said again: "What about the thesis? Have you considered it? I plan to take a postgraduate entrance examination on the spacecraft. Undergraduates like ours may be from the bottom of society, so miserable."

　　"...I should pass the grade point and pass the postgraduate exam, but I don’t have a particularly good thesis. Where did the undergraduates get a good thesis... so annoying! My dad doesn’t bother to guide me!"

　　 Zhang Yuan scratched his head, not knowing what to say.

　　 If his paper is successfully published in "Modern Science", as long as the written test scores pass, generally speaking, there will be teachers asking him.

　　 A district journal of the level of "Modern Science", an average university professor, it is not bad to publish such an article in a lifetime.

　　"Do you have a good idea of ​​what major to study for graduate students?" Zhang Yuan was a little embarrassed, "I have already submitted a paper to Modern Science. If it can be published, I should be able to add a little interview score."

　　 "Huh, "Modern Science", you?" Li Zhendong was taken aback again, but he couldn't react for a while.

　　 Just as the two were chatting, there was a burst of joyous screams from the girl next door.

　　 "Sun!"

　　 "What a beautiful sun!"

　　 is the sun rising from the horizon.

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

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

　　If there is no radiation shielding material, this solar radiation can easily sunburn, and even damage the DNA of human cells, causing permanent damage.

　　Because of this, human astronauts in the old age were not allowed to go to heaven before giving birth. But now with the generation of improvements in radiation protection materials, there is no such requirement.

Under the 　　 there are several dark clouds bursting with lightning, flashing like dianthus flowers in full bloom. Sometimes you can see lightning from different cloud layers in five or six places, illuminating the entire cloud layer.

　　 These sceneries are invisible from the ground.

　　 The girls screamed excitedly: "These clouds are so small, they are not the same as those seen on the plane!"

　　"It must be different, the plane is only a few kilometers high..."

　　"It’s kind of like a cotton ball exploding!"

　　 "If we really fall from this height, we will become a ball of fire, like a shooting star. It will be burned alive, not fallen to death!" A boy threatened very badly, "You can Imagine the scene of becoming coke?"

　　 "Ah!"

　　 twittering screams, coupled with all kinds of panic screams, made Zhang Yuan laugh uncontrollably.

　　Perhaps, he was in the same mood when he first took the space elevator.

　　 In the next few hours, as the altitude increased sharply, the entire Eastern Hemisphere could be seen.

　　The white snow of the Himalayas is vast and desolate; the reddish-brown whirlpool above the Cavill Desert carries a kind of primitive mystery; the forests of the Southeast Asian archipelago shine like emeralds...

　　 is exciting, really exciting!

　　 overlooking the entire earth, there is a sense of boldness that "the world is in my hands".

　　 The vast earth is really floating quietly in the universe just like in the photo.

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

　　 The current altitude is 600 kilometers.

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

　　 The earth is very big, too big!

　　 Even the "octagon", the largest building for humans, is just as insignificant as ants.

　　 But a small human being, from this angle, can easily see every trace of the earth!

　　This kind of strong contrast produces another kind of visual impact. Looking down like a god, everyone has a strange pride, and the whole world has been stepped under their feet.

　　Humanity has actually developed to this level. The Tower of Babylon that leads to the boundless sky, against the incomparably powerful force of nature, is really...unbelievable!

　　Global travel, compared to space travel, what is it?

　　 Hearing the exclamation of the passengers, Zhang Yuan sighed: "You are young, so good."

　　 Li Zhendong nodded in agreement: "too-young, too-native."

　　 The girls next door are still chirping, very excited, they are looking for well-known buildings and natural landscapes on the surface.

　　 "There should be Donghua City..."

　　 "There—Is it the imperial capital?"

　　 "That mountain is Mount Everest, right?"

　　"No, it should be Nanga Bawa Peak."

　　 "That, it should be Wanwan Island..."

　　 It’s a pity that one of the Seven Wonders of the World, the Great Wall, cannot be distinguished with the naked eye. It is a pity that everyone finds it strange.

　　 I used Warwick’s P888 mobile phone, which was able to take pictures of the Great Wall.

　　 There are also several wide asphalt roads, because they are in sharp contrast with the surrounding environment and can be vaguely seen, just like strands of hair.

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

　　……

　　 A few hours later, the tourists finally lost interest and quieted down again. There is no network here, and there is no way to post to Moments. I was in a state of interest but couldn't share it, so I was panicked.

　　 "That... handsome guy?"

　　 Zhang Yuan and Li Zhendong looked at each other.

　　 What about me?

　　 is talking about me!

　　 "...Handsome guy, are you that, that Zhang Yuan? The one who donated! You turned out to be an astronaut!" The other party looked very excited.

　　 Zhang Yuan touched his head, is he already so famous?

　　 The girl opposite glanced at him and said excitedly: "...At that time, I happened to be 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 industry?"

　　 "When did I say that I would enter the entertainment industry? I never planned to..." Zhang Yuan coughed~IndoMTL.com~ replied: "I will follow the spacecraft and leave the solar system."

　　"I knew! The son of a great scientist, how could he do such boring tricks. Haha, I am not saying that being a star is not good, but the social value created is definitely not as good as that of a scientist. I can send friends Circle, clarify this fact?"

　　 "Send it, it's okay."

　　The girl clicked on her mobile 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 again asked a well-answered question: "Well, I have a question to ask you, outside the window, what are the ring-shaped devices that will light up? ?"

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

　　 "Oh..." The girl seemed to understand.

　　 Zhang Yuan smiled.

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

　　Think about it. People pull a hydrogen balloon to get an upward pulling force. The hydrogen balloon will receive a reaction force, that is, a downward pulling force.

　　 By the same principle, when the freight elevator climbs up the cable track, it will lower the height of the space city. Therefore, it is necessary to rely on jet working fluid to push the space station to a synchronous orbit again in order to maintain dynamic balance.

　　 Even if the space elevator has been built, it is still necessary to use working fluid propulsion to maintain balance. What a tragic thing.

　　 But this is already the best way to climb the gravitational well. Who said that the space elevator is not a rigid body?

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