“...... Jupiter, Saturn, Neptune, and so on, many of their moons, are tidally locked by them. ”

Obviously, what Richard said was beyond most people's common sense. The crowd that gathered around, although they didn't know why, all felt that the content he said was more mysterious and profound.

And the people who recognize it the most are some relatively young. Perhaps because they have not forgotten it for long enough, they have not completely returned the physics knowledge in junior high school and high school textbooks to their "beloved" teachers.

"Not only planets and moons, but stars and planets can form tidal locks. For example, the red dwarf......"

When mentioning the new term "red dwarf", Richard sighed when he saw the question mark on the faces of the people around him, and he could only explain it simply.

"Well, you understand it as a small, not too hot sun. Isn't the sun a big fireball? Red dwarfs are smaller, colder fireballs. ”

"Because it's small and cold, the red dwarf's habitable zone is very close to it — well, by habitable zone, my planet, if it orbits in this region, there is a possibility of liquid water. The existence of liquid water is the key to the emergence of life like ours, so it is called the habitable zone. ”

"Because the habitable zone is so close, red dwarfs give a lot of tidal force. Planets located in habitable zones will all be tidal-locked. ”

"That is, when the moon appears, only half of its side can be seen. ”

Richard looked at the crowd around him, and there was silence and silence.

It took a while for some time before people started talking about it. In the whispers of the crowd, the fat man who originally shouted "crossing" once again became the focus of everyone's attention.

"Why do I understand every word he says, but when it comes together, I don't know what it means?" the innocent fat man muttered to a group of people beside him.

Richard: "......"

Liu Sheng and Ah Guan on the top of the tower on the side also looked at each other.

"What the hell is this kid talking about?" Guan looked at Liu Sheng in surprise, and he scratched the back of his head with his hand, making a mess of the loose yellow hair even more. "I only went to high school and couldn't understand what he was saying. Big brother, how did you hear it? Just now, you shouted loudly......"

Before he finished speaking, Liu Sheng had already slapped him on the head. "It hurts, it hurts—it hurts, it hurts, you can't be light, big brother!" the yellow-haired young man nagged.

"You don't even understand high school, your eldest brother and I only went to junior high school, how can I understand? Isn't this looking for a fight!" Liu Sheng scolded.

After a while, he changed the subject, "But I feel that what this little white face said makes sense." ”

Suddenly, Hehe laughed, and added at the end, "If what he said is true, then Brother Liu will be embarrassed." ”

Ah Guan, who was covering his head, also grinned when he heard this, with a happy face, "Don't say it, it's really possible." Brother Liu is an engineer and has real skills, but there may not be anyone who is professional in this area. ”

The crowd below is surging like an undercurrent at this moment.

Richard looked left and right, looked at the surprised eyes of the people around him, and couldn't help but lament that he stood out from the crowd and was about to become a loner.

Words such as "the gap of knowledge" and "interlaced like mountains" flickered in his mind.

"I remember what you said, and in the documentary I saw, there was indeed a record of tide locking. The content of the lecture is basically the same. When Richard sighed again and again in disappointment, the handsome little brother who had shouted before suddenly opened his mouth again.

Richard looked at him at this moment and saw that this young man in black casual clothes and about his age was very familiar. Suddenly, he remembered that this was another person who had "walked" into the crowd.

"But I remember that the tide locking was a little bit more stringent. According to the documentary, once tidally locked, the planet will always face the sun with only one hemisphere — well, the star in the star system in which it is located. After correcting the slip of the tongue, the handsome young man continued, "But because of this, the hemisphere that causes it to turn to the sun will always be illuminated by the sun." The shaded hemisphere is always shrouded in darkness. As a result, the appearance of the two heavens of ice and fire will be produced. The sunny half of the world is like a furnace, and the other half of the shade is like an ice hole. The young man spoke slowly under the attention of the crowd.

As soon as he finished speaking, he immediately whispered again, "Here is another knowledgeable person", "Astronomy is really so complicated", "The more I talk about it, the more I don't understand". In the midst of the noise, most of the crowd shifted their eyes to Richard again, expecting him to reply.

"You're right, but our planet is not completely tidal locked. Richard was overjoyed by the rebuttal.

"Tide locked, just a state of optimism. For example, the earth is also affected by the tidal forces of the sun and is gradually locked in. But considering a number of factors, it will mean billions of dollars of time for it to be finally achieved. Our planet may be in a state where it is about to be completely tidal locked. Richard looked around again, and he raised his arm again.

"I asked it just now and wanted to know the rotation period and revolution period here. Unexpectedly, it did not give a reply. So it's hard for me to be more sure, for example, whether this is a galaxy of red dwarfs, or a galaxy like our sun, which is a yellow dwarf. But now these decades of days and decades of nights, this situation makes sense. ”

"As long as its rotation period is very close to the revolution period, this situation is very likely. ”

"Of course, people have to find it difficult to understand. Richard pushed his eyes, frowning a little, "It's better to understand it this way, the day here - that is, the exchange of day and night, will be very long." Our Earth is 24 hours, and it needs this time. ”

Glancing at the screen in front of him, he exclaimed, "—183.6!"

As soon as Richard finished speaking, Liu Sheng at the top of the tower couldn't hold back his thoughts, and he said to the people around him: "This kid is still a little valuable, it's worth protecting him, Brother Liu seems to like such people." ”

"Is he the only one left?" Guan asked.

"Of course, a phoenix flew out of the grass nest, it's scary enough, you still want to fly out of the two ......" Before Liu Sheng finished speaking, the back of the head of the person next to him was slapped again.

"Say anything stupid......"

However, as soon as this sentence came out, there was a new movement underneath.

"If the time is so long, but it will be the same two heavens of ice and fire! If half of a world is like fire, and the other half is like an ice cave, then the place where it can exist for life is only the morning and dusk line that alternates between day and night?" The young man in black casual clothes asked these questions again, and he also glanced at the sky, "This side seems to be - but such a world is ...... to give birth to life"

"Not necessarily, although insolation is the main factor in determining temperature, the planet also has an atmosphere. Richard retorted with a smile, patiently speaking, "In this regard, there are actually some scientists who have done simulations. They used the example of the Earth and simulated a situation where the Earth is tidally locked. However, in the end, the simulation results showed that even if the tide is locked, the temperature is not too extreme due to the convection of air and water, which is between 40 degrees Celsius and -40 degrees Celsius. ”

"Simulations also show that the hottest point is not the closest point to the sun on the sunny side. In fact, the entire hemisphere exposed to sunlight may be the site of life development. ”

"It's just that compared to our earth, this kind of world is still very cruel. Only about half of it can be used, and due to the huge temperature difference between the yang and yin hemispheres, a series of terrible storms can form. At the same time, there are a series of effects such as magnetic fields. ”

At the end of Richard, he suddenly said, "By the way, you have to consider that this is not a completely tidal locked world." Its yang and yin sides, every 183.6 Earth years, flip each other. Approximately that is, every other year, the morning and dusk line shifts by 2 degrees of longitude. This will illuminate a series of impacts......"

Before he finished speaking, the young man who was facing him at this moment had already blurted out, "If this is the case, that is, there is a cycle of replacement between the yang hemisphere and the yin hemisphere. Then the creatures here, whether animals or plants, are very likely to have species that hibernate for tens or hundreds of years. At the same time, considering the light, that is, there is no difference between day and night here, then it will be difficult for most creatures to have a fixed biological clock. ”

"The boundaries between daytime animals, nocturnal animals, and morning and dusk animals will be removed. ”

"There will be many higher organisms with brains that will develop the characteristics of dolphins. That is, the various brain regions of the brain operate in order, ensuring that the brain domain gets enough rest, but does not sleep. ”

"Even species that have sleeping habits are in a variety of ways in this regard. ”

"At the same time, there will be a significant increase in the number of species with migratory habits. And a large part of it will be the great migration that unfolds around the entire planet in cycles, across all longitudes. ”

"If there were humans on this side and civilization developed, then they would not have a fixed territory. Instead, it will chase the sun forever, periodically launching a large-scale global movement. In this way, it will have a series of effects on civilization. ”

In the silence of the people around him, this handsome young man finished these words with an expressionless face.

His eyes remained fixed on Richard, as if asking for his opinion.

And finding that everyone around him was looking at him, and everyone looked at each other, the young man suddenly scratched his chin, as if he understood something, and then shouted around: "I am very interested in biology and history, and I especially like animal behavior......

The two people on the top of the tower only stared at each other at the moment.

(Seeing everyone's comments, let me explain, this time it was definitely the last to be replaced.) Moreover, this is not an infinite stream, it is science fiction. Perhaps, maybe it's a few pure science fiction at the beginning, ̄□ ̄||. Moreover, there is a system or something, but it is just that there is a little bit of system flow here, but it is by no means the system flow in the usual sense. Is it possible that the high-tech alien civilization that can "pass through" has not even entered the information age, and there must be some big data computing power. As long as you look at the back, you must know it. ）