"Forget it, let me explain."

Li Zhendong turned his head, took the microphone, and explained to the reporter seriously: "What is the cosmic string? An extremely thin and heavy unified field, born at the moment when the universe opened the world, is a linear defect in the phase transition! ”

Many reporters immediately turned on their voice recorders and pretended to be very serious.

"There are two types of it, one is a straight string that crosses the universe, and the other is a ring string of various sizes. The collection of all the strings forms a network that spans the universe. ”

Theoretically, the distribution of cosmic strings in the universe is a bit like a human neural network, from the Milky Way to the Virgo Cluster, the Laniakea Supercluster, and even the entire observable universe.

An image appeared on the screen of the observable universe at 96 billion light-years.

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

The reason why the universe forms a network system, rather than all matter spread out evenly, is because of the cosmic strings.

"Next, it's how to use the cosmic strings to propulsion......"

When cosmic strings were first born, these strings oscillated at speeds close to the speed of light, emitting huge gravitational radiation. But no matter how huge the amount of energy is, it is still consumed in the form of gravitational radiation in more than 10 billion years.

But there are also a small number of strings that have not consumed clean strings, and for some special reasons, they are hidden in the space. So there aren't really many strings that can be utilized.

It is difficult to directly observe the existence of these strings, after all, they are one-dimensional, only length, not width and height.

“…… The cosmic string is very elastic, 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...... Isn't the cosmic string not involved in electromagnetic interactions, so how should it be tied to the Earth? ”

"Even if you can tie it to the earth and generate such a great force, won't the cosmic string break? Strong interactions can't withstand such forces, right? What is it made of? ”

In front of everyone's eyes, Li Zhendong couldn't help but feel a little comfortable, but he still pretended to be serious and said: "I'm just making an analogy to let you understand the nature." ”

"As a one-dimensional thing, it really doesn't participate in electromagnetic interactions, and even if it's around us, there's no way to perceive it. Just like neutrinos, they are able to travel through our bodies without any obstacles. ”

"So, how do you use it to advance? It can't be the pull in it, the answer is ......"

"Gravity!"

"But normally, we don't seem to feel its gravitational pull, so what can we do? As I just said, it's a one-dimensional topological defect that we can exploit. ”

"Professor Li, what is a topological defect?"

"To put it simply, defects caused by topological effects are always defective in the homotopy sense. For example, if there is a certain symmetry group in a system, there will be a vacuum corresponding to the symmetry of the broken symmetry. ”

“…… There is a very low-energy transition state from one vacuum to another, which is commonly referred to academically as soliton, and is a topological defect. As a simple example, the magnetic chips of a ferromagnetic system, because both ends correspond to good ferromagnetic phases, but the direction of m is different, and they are two different vacuum ......"

Many reporters were in an uproar and complaining loudly.

With so many technical terms, it's impossible to understand them, and even if they do, it's impossible to write about them.

Li Zhendong felt very desperate, he looked back at Zhang Yuan with a smile on his face, and wondered how this guy dealt with reporters.

"Everyone, don't be impatient...... To put it simply, a condensed matter approach can be used to reactivate the gravitational pull of a cosmic string that is dormant. ”

"In the end, you can refer to the graviton shielding experiment on the earth at the beginning, and there are certain commonalities...... That is, the gravitational equilibrium state needs to be broken. Of course, it's just a small piece of cosmic string gravitational pull, only a few seconds or minutes. ”

He drew a simple image on the screen: a spaceship was slowly sailing, with a cosmic string in front of it, and the airship suddenly fired a cannonball, disturbing the dormant state of the cosmic string in front of it, causing it to start a small vibration and emit a huge gravitational pull.

"But this short period of time is enough, think about it, if the spaceship is sailing, there is a huge gravitational force in front of it, will the whole spaceship be sucked over?"

"Of course, this gravitational pull will quickly disappear again, but the kinetic energy of the spacecraft, that is, the velocity, will not disappear."

"Then we activate the strings further ahead, and repeat the process over and over again, and the speed of the ship will get faster and faster!"

That's what kind of ...... A new way to advance!

This time, all the reporters understood.

Gravitational Propulsion and Interstellar Voyage

Letter from the Golden Sun

Humans of Captan

In just half a day, after this series of special reports were broadcast, it quickly caused a stir in the society, and the information about the Golden Sun, as well as the gravitational push, naturally became the most talked-about topic.

Humans, who were a little slack, have re-erupted with greater enthusiasm for work!

Similar discussions can be heard on the streets.

"The Golden Sun's Captan is so far away...... It's almost two directions. The cosmic string in the middle is still broken, and we shouldn't go out of our way to make a trip. ”

"The first time you sail with a cosmic string, you should pick a star that is a little closer...... At least I think so. ”

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

Even the Kunlun Mountains had to be slightly changed, after all, gravitational propulsion is much more optimized than traditional working fluid propulsion, and there is no longer a need to use the vast majority of tonnage to load fuel. Therefore, some fuel warehouses in the entire Kunlun Mountains can be modified into industrial areas, living areas, and agricultural areas.

Originally, the mass of fuel had to occupy more than 70% of the entire ship, but now it only needs to occupy 20% of the mass, and even, more aggressively, 10% is actually enough.

That's 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 string, so that there are a lot fewer stars that can go, and not every star is near the cosmic chord.

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

On the other hand, the device for inducing gravitational fluctuations is also being studied urgently.

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

In other words, everything is ready, and only the east wind of "Kunlun Mountain" is owed.