Deep Space Fleet

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"Forget it, let me explain."

Li Zhendong turned his head, took the microphone, and explained to the reporter solemnly: "What are cosmic strings? An extremely thin and extremely heavy unified field, born at the moment of the universe's creation, is a linear defect in the phase transition!"

Many reporters immediately turned on their recording pens, pretending to be very serious.

"It is divided into two types in total, one is a straight string that traverses the universe, and the other is a ring string of various sizes. The collection of all strings forms a network that covers the universe."

Theoretically, the distribution of cosmic strings in the universe is a bit like the human neural network. There are such network structures in the Milky Way, the Virgo galaxy cluster, the Laniakea supercluster, and even the entire observable universe.

A picture appeared on the screen, which was the observable universe 96 billion light years away.

This image has not undergone any artistic treatment, and any dot of light in it represents a galaxy. From a certain angle, the distribution of these galaxies is too much like a neural network.

The reason why the universe will form a network system, instead of spreading all matter evenly, is because of cosmic strings.

"The next step is how to use cosmic strings to propel..."

When cosmic strings were just born, these strings vibrated at a speed close to the speed of light, emitting huge gravitational radiation. But no matter how huge the energy is, it was consumed in the form of gravitational radiation in more than 10 billion years.

But there are also a small number of clean strings whose energy has not been consumed, because of some special reasons, they are hidden in the space. So there are not many strings that can really be used.

It is difficult for people to directly observe the existence of these strings. After all, this is a one-dimensional thing, only length, no width and height.

"...cosmic strings are very flexible. If a string is tied to the earth, it can accelerate the earth to 3000Km/h in 1 second!"

Hearing this, a female reporter asked curiously: "Professor Li, your statement seems a bit strange... Aren't cosmic strings not involved in electromagnetic interactions, so how should they be tied to the earth?"

"Even if it can be tied to the earth to generate such a large force, won't the cosmic string be broken? The strong interaction can't bear such a force, right? What is it made of?"

Li Zhendong couldn't help being a little bit relieved to be the focus of everyone under the eyes of everyone, but he still pretended to be serious and said: "I'm just using an analogy to let you understand the nature of it."

"As a one-dimensional thing, it does not participate in electromagnetic interactions, and there is no way to perceive it even around us. Just like neutrinos, it can pass through our bodies without obstacles."

"So, how to use it for propulsion? It can't be the pull force, the answer is..."

"gravitational!"

"But usually, we don't seem to feel its gravity. What should we do? As I just said, it is a one-dimensional topological defect, which we can use."

"Professor Li, what is a topological defect?"

"Simply speaking, the defects caused by topological effects always have defects in the sense of homotopy. For example, if there is a certain symmetry group in a certain system, after the symmetry is broken, there will be corresponding to the broken symmetry. vacuum."

"...There is an extremely low-energy transition state from one vacuum to another. This situation is generally called a soliton in academics, which is a kind of topological defect. To give a simple example, the magnetic chip of the ferromagnetic system , because both ends correspond to good ferromagnetic phases, but the directions of m are different, and they are two different vacuums..."

Many journalists made noise and complained loudly.

There are so many technical terms, it is impossible to understand them, even if they understand them, it is impossible to write them in the report.

Li Zhendong felt very desperate. He turned his head to look at the smiling Zhang Yuan, and wondered how this guy dealt with the reporters.

"Don't worry, everyone... Simply put, a condensed matter method can be used to reactivate the gravity of dormant cosmic strings."

"How to do it, you can refer to the graviton shielding experiment on the earth at the beginning, there are certain things in common...that is, the need to break the gravitational balance. Of course, it is only a short section of the gravity of the cosmic string, only a few seconds Or a few minutes."

He drew a simple image on the screen: a spaceship was sailing slowly, with a section of cosmic string in front of it. The vibration exudes a huge gravitational force.

"But a short period of time is enough. Think about it, if a huge gravitational force is suddenly generated in front of the spaceship while it is sailing, will the entire spaceship be sucked in?"

"Of course, this period of gravity will disappear quickly again, but the kinetic energy of the spacecraft, that is, the speed has not disappeared."

"Then we activate the strings further forward and repeat this process continuously, and the speed of the spacecraft will become faster and faster!"

This is a... new way of propulsion!

This time, all the reporters understood.

"Gravity Propulsion and Interstellar Voyage"

"Letter from the Golden Sun"

"Humans of Captan"

In just half a day, after the broadcast of this series of special reports, it quickly caused a great uproar in the society. The information about the Golden Sun and its gravitational force naturally became the most talked about topics.

Human beings, who were a little slack at first, broke out with greater enthusiasm for work again!

Similar discussions can be heard in the streets and alleys.

"Golden Sun's Kaptan star is so far away... It's almost in two directions. The cosmic string in the middle is broken, so we shouldn't make a special trip there."

"For the first time to use cosmic strings for voyages, you should choose a closer star...at least I think so."

"It doesn't make much sense to meet people from the Golden Sun."

Even Kunlun Mountain has to be slightly modified. After all, gravity propulsion is much more optimized than traditional working fluid propulsion, and it is no longer necessary to use most of the tonnage to load fuel. Therefore, some fuel warehouses in the entire Kunlun Mountains can be modified into industrial areas, living areas, and agricultural areas.

In the past, the mass of the fuel had to account for more than 70% of the entire spaceship, but now it only needs to account for 20% of the mass. Even, to be more radical, 10% is actually enough.

This is the superiority of gravitational propulsion!

Of course, gravitational propulsion also has certain limitations. Whether it is acceleration or deceleration, it must be carried out near the cosmic strings. In this way, there are many fewer stars that can go. Not every star has Cosmic strings are available.

And the conventional way of propulsion is still indispensable. Otherwise, if it is separated from the cosmic strings, wouldn't the entire spaceship be unable to move?

On the other hand, the device for causing gravitational fluctuations is also under urgent research.

Scientists have discovered a usable cosmic string near Gliese 581, which is great news!

That is to say, everything is ready, only the east wind of "Kunlun Mountain" is owed.