"The most important feature of this level of civilization is antimatter. Based on this, this level of civilization can basically be sure to apply antimatter to its weapon system.
Compared with level 2 civilizations, their spaceships can be built larger, faster, and have more powerful weapons, which can crush level 2 civilizations.
In this way, it is easy to understand that the deep space civilization was eventually destroyed by the Moyunlitar civilization. Because the Moyunlitar civilization is a relatively typical level 3 civilization."
"Level 4 civilization, no working substance civilization, or also called super star cluster level civilization.
We believe that at the peak of level 3 civilization, the potential of the ion propulsion engine will be tapped to the highest level, with the highest efficiency and driving force. At this time, the civilization will inevitably begin to develop more advanced, more energy-saving, and more efficient
thrusters to achieve higher speed and range of motion.
However, within the current scientific and technological system, within the scope of conventional propulsion methods, it is no longer possible to find a more efficient propulsion method than ion propulsion. The only propulsion method that can achieve more efficiency than ion propulsion is only one, working fluid-free propulsion
.
Propulsion without working fluid is still quite far away from us at present. We cannot speculate on the specific technical details of this propulsion method. There are only two conjectures.
First, with the help of certain oscillation characteristics of quantum vacuum, we can obtain forward momentum from it through special influence methods.
Second, optical radiation propulsion, that is, by ejecting high-energy-density photons backward to achieve the purpose of pushing the spacecraft forward. Because the rest mass of photons is zero, this propulsion method can also be called zero.
Working fluid advancement.
Regarding the source of energy, we are still unable to speculate whether Level 4 civilization still relies on large-scale controllable nuclear fusion as an energy source and uses antimatter as an energy storage 'battery'. We do not know how high a Level 4 civilization will be.
Afterwards, breakthroughs in basic theory can lead to more advanced energy source methods."
"Level 5 civilization, light speed or super-light speed civilization, or spiral arm civilization.
Before level 5 civilization, the sailing speeds of level 0-4 civilizations were all limited to below the speed of light. But at the level 5 civilization stage, we believe that they will be able to break the speed of light limit. But as for the specific technical details of breaking the speed of light limit,
What, we can't make too precise a guess.
There is only one guess at the moment, which is Alcubierre's metric. Simply put, it causes the space in front of the spacecraft to shrink, the space behind it to expand, and the spacecraft to ride on the fluctuations in an interval. This interval is the so-called
By using the 'warp bubble' to drive the spacecraft forward, it can achieve a sailing speed equal to or exceeding the speed of light.
However, although Alcubierre's metric is mathematically feasible and conforms to Einstein's field equations, its calculation results may not have physical meaning, nor do they necessarily mean that such a device can actually be built.
.
Because this hypothetical mechanism implies negative energy density, it requires the participation of matter with negative mass to create it. If 'negative matter' does not exist, the existence of this engine can be falsified.
We cannot be sure whether super-light travel in the future will really be realized in this way - it is also possible that this technology does not exist in the universe. But if there is a civilization that has mastered this technology, we will divide it into
It is a level 5 civilization.
As for the source of energy that supports this way of navigation, we cannot speculate for the time being. Because in our understanding, the annihilation of matter and antimatter with an energy conversion efficiency of 100% is already the upper limit. And obviously, the annihilation of matter and antimatter does not
There is no way to support this type of navigation.
Because a civilization that has mastered this technology can have an activity range of thousands or even tens of thousands of light-years, we also call it a spiral-arm civilization."
"Level 6 civilization, wormhole civilization or river system civilization.
Pure super-light navigation, even if the speed is as high as 10 times or 100 times the speed of light, although this is a super technology that we cannot imagine, it still seems too slow when facing the vast space. We believe that in the curvature
Beyond navigation, it is very likely that there are more advanced navigation methods.
In this way, we currently have almost no theoretical reserves, but we have already made some speculations. Wormholes, space folding, space jumping, etc. are all descriptions of this way of navigation.
With the help of this method of navigation, the speed of a spacecraft can no longer be measured by multiples of the speed of light. It is even possible to achieve instantaneous communication between two places. We believe that this level of civilization has
There is no doubt that the area of activity can reach as many as an entire river system. Therefore, we also call it a river system-level civilization.
Level 6 civilization and above are beyond our ability to speculate based on our current technological and theoretical levels."
Looking at the document in his hand, Zhao Changxing pondered for a long time.
This is the most crazy imagination of human civilization about the super civilization that may exist in the universe and its technological methods.
After that, Zhao Changxing held several more meetings and announced a series of important decisions.
The most important one is undoubtedly to completely change the civilization development strategy at this stage, from "development first" to "war preparation first."
In any case, when facing a mining spaceship, if it has malicious intentions towards you, then you must try to resist.
At this stage, Zhao Changxing has not chosen to announce the fact that "a mining spacecraft of the Moyun Litar civilization is very likely approaching the solar system." After all, no matter how reasonable the speculation is, this may be a misunderstanding, and it is possible that
It's not a super spacecraft that can light up the entire nebula, it's just people scaring themselves.
Until tangible evidence is obtained, there is no need to cause civilized chaos by publicizing it.
So, without most people knowing about it, a comprehensive war preparation operation began.
More factories were classified as military factories, and more people were recruited into the army. Social resources began to quietly tilt toward the military industry, and social construction activities stopped unconsciously.
The combat readiness operation centered on each dwarf planet. People began to build electromagnetic gun turrets one after another and laser cannon bases one after another on more than a dozen dwarf planets. At the current stage, laser cannons suitable for actual combat have been successfully developed.
.
From an overall strategic perspective, a dwarf planet can also be regarded as a giant space battleship that cannot be destroyed. In future wars, they may have unexpected effects.
In addition to the construction of fixed military facilities, people have also built numerous spy satellites and thrown them into space like sand. In the low-Earth orbits of various dwarf planets, people have also built numerous space fortresses.
The construction of combat spacecraft has also entered an unprecedented peak period. One spacecraft after another rolled off the assembly line from the dock, was delivered to the military, and then handed over to soldiers who had been trained in advance, and combat effectiveness was immediately formed.
The people who are located in the Jupiter system and are responsible for providing resource support to Sedna Planet also temporarily slowed down the task of sending supplies to Sedna Planet and began large-scale war preparation operations.
Under this situation, time passed rapidly. Thirteen years after the "reflection nebula" was observed from a distance, people obtained tangible evidence about the mining spacecraft of the Moyunlitar civilization.
Yes, the miracle that people expected did not happen in the end. What lit up the nebula was indeed a huge spacecraft.
The performance has been improved many times compared to the past, and the space telescope array, which is pointed in that direction day and night and dare not relax at all times, has truly photographed its figure.
Although it is only one pixel in size.
But this can also be proven without a doubt.
So, now that more and more people have noticed that civilization is quietly changing through every detail of their lives, Zhao Changxing announced the information about this spacecraft.
As Zhao Changxing expected, the announcement of this incident immediately caused panic among the civilization. However, under Zhao Changxing's strong suppression, no trouble was caused.
Life goes on, and so does war preparation.
The latest accurate prediction shows that the arrival time of that giant spacecraft will be about three years later. And its orbit has also quietly undergone some changes in the past period of time.
At this moment, it will come directly to the vicinity of Sedna Star, instead of passing by 820 million kilometers away from Sedna Star as previously predicted.
This clearly proves that the mining spacecraft of Moyun Litar Civilization intends to destroy the small insects buzzing next to it before officially starting to work, as Zhao Changxing said at the beginning.
At this point, people had to throw away the last bit of fantasy and the last bit of luck.
War preparations are still progressing rapidly. At this moment, with Sedna as the core, more than a dozen dwarf planets have been turned into war fortresses. Only a dozen new combat spacecraft are enough to destroy the original deep space civilization.
, and now the number has increased to 3,000.
At this time, as the distance between the two parties shortened, the space telescope array finally captured the real image of the spacecraft.
It does have only one spaceship. Its shape is roughly an irregular rectangular parallelepiped shape, which is relatively flat. People can vaguely see many bulges, depressions and ravines on its surface, but no rotating structure is seen.
It seems that it does not rely on rotation to generate gravity. Or, it does not have an artificial gravity system at all.
Its size is roughly as expected, with a length of 26 kilometers, a width of 17 kilometers, and a height of about 6 kilometers.
No matter where you look at it, it is a veritable behemoth.
Zhao Changxing once again summoned all the top leaders of civilization.
"In addition to combat preparation operations, we also need another thing." Zhao Changxing said lightly: "We need a spaceship that is larger and more advanced than this Moyun Litar civilization, at least a level 4 civilization.