As Zhao Lan thought, the Robachevsky space is just a space in mathematical concepts. It is a space described by Robachevsky's geometry. There are many peculiar phenomena in this space, such as in this space, the pi is larger than the normal space, and the sum of the inner corners of the triangle is smaller than the normal space. At the same time, in Roche space, you can make at least two parallel lines by passing a point outside the straight line, and passing three points not on the same straight line may not necessarily make a circle... etc.

This was originally just a concept in mathematics, but in this record, Li Yunfan said that he found such a space in the real universe and determined this through field measurements.

If normal space, that is, the space described by Euclidian geometry, is straight, then the space described by Robachevsky geometry is "curved". If a space is curved, it seems reasonable to not observe the stars that can be observed in normal space in such a space. Zhao Lan can imagine such a picture, because of the curvature and bending of the space in Roche space, some space parts may be hidden because of the "folds" of space. The light of the stars does not spread completely along the space, but directly passes through this wrinkled space and directly spreads to the other side of the wrinkled. Then people in the space will naturally not be able to see those stars.

It's like a river or a ditch appears in space. The light is an animal that jumps directly from the gully or from the river. It jumps directly from the gully wall and does not follow the gully wall to the bottom of the gully.

As for why the farther away stars disappear earlier, this can be explained by the curvature of space. Although a two-dimensional plane can be compared to space, it is not accurate. The characteristics of space cannot be fully described by a piece of two-dimensional paper. Zhao Lan guessed that the farther away from the earth, the greater the curvature of space, so it is easier to disappear from the earth's field of view.

"Is... our earth in Robachevsky space at this moment?" Zhao Lan thought silently, "But, we have not found any abnormality in the measurement of geometric data on Earth or Mars."

As long as this argument can be confirmed, that is, as long as people really find pi or the inner angle of the triangle through measurement and compare the changes in previous data, people can truly prove this. And they can calculate the angle of space bending by specifically generating numerical differences in change, and then calculate the perfect spatial model around the earth at this moment through Roche geometry. If this can be done, the mystery of the disappearance of stars will be revealed.

"But we still have no evidence." Zhao Lan shook her head, put aside the thoughts in her mind, and continued to read the information.

Li Yunfan continued to write in this information: "After determining this, I immediately guessed that this should be a piece of Robachevsky space in our universe. In mathematical calculations, all theorems of Roche geometry have been perfectly verified in this space, and all experimental and observational data are telling the uniqueness of this space. I don't know where this strange space comes from and how it was born. It may be born in the depths of the infinite universe, due to the wars of some super civilizations or some special physical processes in the universe environment. Who knows, I don't know what era it was born. It may have been in drifting motion, drifting in the endless universe for tens of millions of years before it drifted into our solar system. Finally, I discovered it by a very accidental opportunity."

"Roche space is not the same as normal space. According to this principle, spacecraft and mechanical equipment suitable for normal space should not exist in Roche space. The simplest example is that due to the change of pi, balls or bearings that could operate normally in the past may become less rounded in Roche space, and the friction will increase greatly, which will eventually lead to mechanical damage. However, through my personal experiment, my spacecraft can still operate normally in this strange space. I guess, this is probably because the space data changes too small, and our current mechanical technology has far from reaching such accuracy, so it will not have an observable impact on us."

Zhao Lan believes that this guess is very logical. It is like a child using three wooden strips to piece a triangle. Because this triangle made of three wooden strips is originally inaccurate, even if the inner corner sum of the triangle is adjusted to 181 degrees, it probably will not have any impact on the triangle.

To a certain extent, the mechanical technology of human civilization and the mechanical accuracy that can be achieved are actually similar to a child who spells out a triangle with three wooden strips. There is actually no essential difference between the two. Therefore, the changes in pi and many other spatial data did not have any intuitive impact on the spaceship Li Yunfan was riding at that time.

"The real existence of Roche space seems to suggest the feasibility of space curvature navigation. After all, if light can directly cross some space folds and not completely move along the space, it is precisely this reason that when we are in Roche space, the abnormal disappearance of distant stars will be achieved. We humans should also use technological means to create spacecraft that can cross space folds. This seems to indicate a way for human civilization to create super-light speed spacecraft."

"I and the team of scientists I led are very interested in, so we began to concentrate our scientific research forces in this area and devote ourselves to researching this strange space."

The text narrative record left by Li Yunfan ends here, and the following are many descriptions of mathematical models, physical characteristics descriptions, some conjectures, and many calculation processes. Although Zhao Lan also has some knowledge in this field, the knowledge cannot reach the point where these calculation processes are understood at all. Therefore, Zhao Lan cannot understand these things very well.

But even with Zhao Lan's scientific literacy, Zhao Lan can see... these calculation processes are profound and complex, and each step is connected naturally and has a rigorous logic. Such a piece of information needs extremely advanced professional knowledge as the basis for falsification. Ordinary people, or ordinary scientists, cannot do such falsifications even if they want to do such falsifications.

Zhao Lan flipped through these calculation processes and then saw that the follow-up research record writer changed from Li Yunfan to Rodriguez. It is obvious that after Li Yunfan disappeared, the research on the strange space did not stop. Under Rodriguez's leadership, this team of scientists who were out of the sight of the human government continued to study this.

Zhao Lan naturally knew where Li Yunfan went. A few months ago, while Li Yunfan drove his Sylvia spacecraft back to Earth, perhaps because of the final outbreak of Haishan II, Li Yunfan inexplicably traveled from this universe to another universe. There was nothing but darkness in that universe, and Li Yunfan was trapped there and could never escape...

Subsequently, the recording file written by Rodriguez recorded some research results of their scientists' team after Li Yunfan disappeared. The most important record was that they found that since the outbreak of the second supernova in Haishan, the space curvature of the strange space has begun to increase abnormally for some reason, and its volume has begun to expand rapidly, even covering the entire earth. Moreover, the structure of the strange space has produced more complex changes compared to the past. The scientists led by Rodriguez are intensively calculating and observing the possible impact of this change in the strange space on the earth, but until now, they have not made any specific discoveries.

The team of scientists led by Rodriguez did not know what impact this strange space had on the earth. Zhao Lan, a member of the 105 Institute, knew very clearly. Distant celestial bodies kept disappearing abnormally, and the distance between the observable vanishing star bodies and the earth was getting closer and closer... This is the most intuitive manifestation of this influence.

The closer the distance between the observable abnormally disappeared star body and the earth, the greater the curvature of the space where the earth is located. When the curvature reaches a certain level... Maybe it will really be like Li Yunfan's encounter. The channel between the two universes will be opened, and the earth will fall from this universe to that completely empty universe. From then on, it will be blocked by darkness and loneliness. Human civilization will step into space, and the path into the interstellar era will be completely cut off. Human civilization will be trapped there after exhausting all resources on the earth...

The scene you see from the perspective of the earth is that the stars in the sky disappear one after another, and in the end there will be no bright spots in the sky. The night sky of the earth will completely turn into darkness, and no stars will be seen in humans' vision...

This strange space is not just a piece of space. It is a bottomless abyss that is enough to destroy a planet and to extinct the entire human civilization in despair. It is a sharp sword hanging above the heads of all human beings.

Facing this possibility, Zhao Lan felt a little chilled. (To be continued...)

ps: The third update ~
Chapter completed!