When Dr. Tan heard this, he was stunned.

The three-body problem is a fundamental problem in astrophysics, and the specific model is the mutual motion of three particles in space under the influence of their respective gravitational forces, which is one of the major mathematical problems.

At present, there is no precise solution to the three-body problem known to mankind, only a special solution under specific initial conditions, and once the initial conditions change, even just a little bit, it will lead to a complete change of the whole system and a completely different answer.

They are exposed to some similar problems when observing massive objects, but this is not the focus of their research.

Now when I hear Xu Rui mention it, I feel a little surprised.

"Mr. Xu, your new work is related to mathematics?"

Dr. Tan asked subconsciously.

You can't really write about three stars.

"It's about extraterrestrial civilizations."

Xu Rui replied briefly.

"You really like that."

Dr. Tan also watched "Rural Teacher", after all, many of the theoretical models of special effects in it are from his own students, and it is also appropriate for him to check the teaching results as a teacher.

The aliens that appear in the movie are just a pleasure for people like Dr. Tan who are engaged in research.

In fact, humanity itself is a miracle piled up by coincidence.

For example, why humans and their related races are five-fingered instead of four-fingered or six-fingered, ordinary people may analyze the benefits of five fingers at first glance, the help to evolution, and so on.

But the real situation is nothing more than the five-fingered ancestor who survived by chance.

Four fingers or six fingers didn't matter at all in an age when 90 percent of creatures were wiped out at every turn.

Even some species that originally dominated the world have become completely extinct and fossilized because of weather changes in just a few hundred years.

Dr. Tan is not engaged in paleontological research, but he has heard of it, and he feels that if aliens really exist, then their image must be completely different from that of earthlings, whether it is physical form, social structure, or even civilization intentions.

The aliens in "The Country Teacher", in order to facilitate the development of the plot and the understanding of the audience, are still too anthropomorphic.

Of course, it doesn't hurt.

"I'm thinking about the story that shows the sociology of the universe, Dr. Tan, can you help me refer to it?"

"Cosmic sociology?"

Dr. Tan came interested.

It is impossible to say that astronomy does not have a heart to discover aliens.

Xu Rui quickly explained the two axioms of cosmic sociology, the chain of suspicion and the explosion of technology to Dr. Tan, and some students watched during the process, but they were all rushed back by Dr. Tan to continue to give a report.

Dr. Tan just nodded silently and didn't interject until Qiao Qiao finished speaking, and then he breathed a sigh of relief.

"Mr. Xu, sometimes I really suspect that it is a waste for you to use your talents in making movies and making animations."

Dr. Tan praised first.

"Your cosmic sociology does have some research value, of course, we don't have a reference now, but this theory can already explain some problems, such as the Fermi paradox, Mr. Xu, you should know it."

"Well, that's the one that said that aliens evolved a million years before humans."

Xu Rui replied.

The Fermi paradox was proposed by physicist Fermi, who pointed out that if human beings have developed a million years and developed extremely high technology to explore the galaxy and find extraterrestrial civilizations, then why can't there be a civilization in other galaxies, or other planets in the galaxy, that evolved a million years earlier than humans, to visit humans?

It boils down to either there are no aliens, or aliens should have already come to Earth a long time ago.

The description of this paradox, while superficial, is also straightforward, and scientists have been trying to solve it for years.

Some people think that the earth is a special planet and there is no extraterrestrial civilization, some think that extraterrestrial civilizations once existed, but they could not have contact with the earth, and the development level of civilization is very average, and there are those who think that aliens have come to the earth, but we don't know.

None of these conjectures can be proven, so this paradox has become the talk of science fiction enthusiasts and scholars.

However, cosmic sociology and the theory of the dark forest can solve the Fermi paradox to a certain extent: that is, all advanced civilizations are hidden, and the low-level civilizations that they have discovered are cleaned up, and in the universe, there are cruel wars for survival all the time.

The two discussed it for a while, and Dr. Tan said.

"Of course, this is just a science fiction theory, if you think about it carefully, human beings should still be able to find some traces of weak civilizations, some traces of unnatural destruction of other civilizations."

"Well, it's just a sci-fi idea."

Xu Rui naturally knows it.

"I'm going to set an alien civilization on the planet α Centauri, and the civilization above is preparing to leave the galaxy due to the chaos of the three-body system, what do you think, doctor?"

α Centauri is the closest star system to Earth, at only 4.37 light-years.

"South Gate Two...... No wonder you want to discuss the three-body problem. ”

Dr. Tan suddenly realized, but quickly frowned, went to the computer, and knocked several times.

"I might be going to disappoint you, though."

On the computer are astronomical photographs of α Centauri, as well as some data, which can be found in the astronomical star library.

"Although this is a three-star system, because the mass of the third star is so small and far away, it can actually be seen as a binary system with another star, and at present, this star system is stable."

Dr. Tan explained, but he soon understood that this level of detail was not important, and that the Centauri α was indeed a lot of confusion compared to the Sun and Earth, and that if life on the planets in that field had not been destroyed because of this, but had grown, it would indeed be a great threat to humanity.

After that, Xu Rui and Dr. Tan discussed some details and technical issues, after all, Xu Rui is not a professional researcher, and it is important to refer to the opinions of scientists.

Dr. Tan is not the kind of pedantic intellectual, knowing that sometimes drama is more needed than complete scientific rigor, so he also helped Xu Rui with advice.

Xu Rui returned to the company after having dinner at the observatory, saw Xu Rui away, and Dr. Tan returned to the laboratory.

"Teacher, are we going to help make a movie again?"

Some students asked curiously, the special effects in "Country Teacher" have their part, which makes these students go home and pretend to be with their families and friends more confident, and the cooperation with Phantom Media can be regarded as a spice in research life.

"Go, go, have you finished writing the report, have you done the analysis, and have you finished your observation plan for next year?"

Dr. Tan chased the students away.

But I have a little more expectations.

()