As Zhao Lan thought, the Lobachevsky space is just a space in the mathematical concept, and it is a space described by Lobachevsky geometry. There are many peculiar phenomena in this space, for example, in this space, the pi is larger than the normal space, and the sum of the inner angles of the triangle is smaller than the normal space. At the same time, in Roche space, at least two parallel lines can be made by passing a point outside the straight line, and a circle may not be made by crossing three points that are not on the same straight line...... Wait a minute.

Originally, this was just a concept in mathematics, but in this record, Li Yunfan said that he had found such a space in the real cosmic space, and confirmed this through field measurements.

If normal space, that is, space described in terms of Euclidean geometry, is flat, then space described in Lobachevsky geometry is "curved". If a space is curved, it seems reasonable that no stars can be observed in normal space in such a space. Zhao Lan can imagine such a picture, because of the curvature and curvature of space in Roche's space, some parts of the space may be hidden because of the "folds" of the space, and the light of the stars does not completely spread along the space, but directly passes through this section of the folded space, and directly spreads to the other side of the folds. Then people in the folded space will naturally not be able to see those stars.

It's like there's a river or a ditch in space. The light is an animal that jumps directly over a ravine or a river. It jumps straight over it, and does not follow the wall of the ravine to the bottom of the ravine.

As for why the farther stars disappear earlier, this can be explained by the curvature of space. Although the two-dimensional plane can be compared to space, it is not exact, and the characteristics of space cannot be fully described by a two-dimensional piece of 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 vision.

"Could it be...... Is our earth in Lobachevsky space at this moment? Zhao Lan thought silently, "However, we have not found anything abnormal in the measurement of geometric data on Earth or Mars. ”

As long as this one argument can be confirmed. In other words, as long as people really find the change in pi or the inner angle of the triangle compared to the previous data through measurement, people can really prove this, and they can calculate the angle of the curvature of space by the difference in the value that produces the change. Then, from this, Roche geometry is used to calculate a perfect model of the space around the earth at this moment. If this can be done, then the mystery of the disappearance of the stars will be solved.

"But we still don't have any evidence." Zhao Lan shook his head, put aside these thoughts in his mind, and continued to read these materials.

Li Yunfan continued to write in this document: "After confirming this, I immediately guessed that this should be a Lobachevsky space in our universe. Mathematical calculations. All the theorems of Roche geometry have been perfectly verified in this space, and all the experimental and observational data tell the difference of this space. I don't know where this strange space came from or how it came to be -- it may have been born in the infinite depths of the universe, because of the wars of some super-civilization or some special cosmic environmental physical processes, who knows - I don't know when it was born. It may have been drifting for thousands of years, drifting in the endless universe before it reached our solar system, and was finally discovered by me by a very serendipitous chance. ”

"Roche space is not the same as normal space, according to this reason, spaceships and mechanical equipment suitable for normal space should not be able to exist in Roche space, the simplest example. Due to the change in pi, balls or bearings that used to function normally may become less rounded in the Rogowski space, and the friction will also increase greatly, which will eventually lead to mechanical damage. However, through my own personal experiments, my ship can still operate normally in this strange space. My guess is that this is probably because the spatial data changes so little, and our current mechanical processes are far from being able to achieve that level of accuracy, so it doesn't affect us observably. ”

Zhao Lan thinks this speculation is very logical. It's like a child making a triangle out of three sticks of wood, because the triangle made with three sticks of wood is inherently inaccurate, so even if the inner angle of the triangle is adjusted to 181 degrees. It probably won't have much of an effect on the triangle either.

The mechanical technology of human civilization and the mechanical precision that can be achieved are, to some extent, similar to a child making a triangle out of three wooden sticks, and there is no essential difference between the two. Therefore, the changes in pi and many other spatial data did not have any direct impact on the spacecraft that Li Yunfan was riding at that time.

"The real existence of Roche space seems to hint at the feasibility of space curvature navigation. After all, if light can pass directly over some fold of space and not completely follow the space - this is what causes the time to be in Roche space. The phenomenon of the anomalous disappearance of distant stars - then we humans should also be able to create spaceships that can pass through the folds of space through scientific and technological means. This seems to point the way for human civilization to build faster-than-light spaceships. ”

"I and my team of scientists were very interested in this, so we began to focus our scientific research efforts on this area, and we went all out to study this strange space."

This is the end of the written narrative left by Li Yunfan, followed by a lot of mathematical model descriptions of the space, physical property descriptions, some conjectures, and many calculation processes. Although Zhao Lan also has some knowledge in this field, he can't understand these calculation processes at all with that knowledge. So Zhao Lan can't understand these things too well.

But even with Zhao Lan's scientific literacy. Zhao Lan can also see ...... These calculations are esoteric and complex, and each step is naturally connected and logical. Even if you want to falsify such a document, you need to have extremely advanced professional knowledge as the foundation. Ordinary people, or ordinary scientists, can't do it even if they want to.

Zhao Lan turned over these calculation processes, and then saw that the follow-up research record writer changed from Li Yunfan to Rodriguez. Obviously, after Li Yunfan's disappearance, the research on this strange space did not stop, and under the leadership of Rodriguez, this team of scientists who were out of the sight of the human government continued to study it.

Zhao Lan naturally knew where Li Yunfan had gone. A few months ago, in the process of Li Yunfan driving his Sylvia spaceship back to Earth, perhaps because of the impact of the final eruption of Haishan II, Li Yunfan inexplicably traveled from this universe to another universe, and that universe had nothing but darkness, and Li Yunfan was trapped there all the time, unable to escape......

Later, Rodriguez wrote a record of some of the research results of their team of scientists on the strange space after Li Yunfan's disappearance. The most important record is that they found that since the explosion of the Seamount II supernova, the spatial curvature of this strange space has begun to increase abnormally for some reason, and its volume has begun to expand rapidly, even enveloping the entire Earth in it. And the structure of this strange space has produced more complex changes than before, and the team of scientists led by Rodriguez is intensively calculating and observing the possible impact of this change in the strange space on the earth, but so far, they have not made any concrete discoveries.

The team of scientists led by Rodriguez did not know what impact this strange space had on the earth, but Zhao Lan, who was a member of the 105 Research Institute, knew very well. Distant objects are constantly disappearing anomalously, and the distance between the observable vanishing stars and the Earth is getting closer and closer...... This is the most intuitive manifestation of this impact.

The closer the observable anomalously disappearing star is to Earth, the greater the curvature of the space in which Earth is located. When the curvature is large enough to a certain extent...... Maybe it will really be like what happened to Li Yunfan, the passage between the two universes will be opened, and the earth will fall from this universe to the completely empty universe, and will be blocked by darkness and loneliness from then on, and the road for human civilization to step into space and enter the interstellar age will be completely cut off, and human civilization will be trapped there after exhausting all the resources of the earth......

From the perspective of the earth, the stars in the sky disappear one after another, and eventually there will be no bright spots in the sky, and the night sky of the earth will become completely dark, and there will be no stars in the field of vision of human beings......

This strange space is not just a space. It is a bottomless abyss enough to sink a planet, enough to wipe out an entire human civilization in despair, and it is a sharp sword hanging over the heads of all mankind.

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

PS: The third more ~