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Text Chapter 27 Mars Retrograde

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    Indeed, as the old man said, based on the history of the world that Yunyang experienced, the geocentric theory has not been refuted by the evidence of Venus phase changes.  This only proves that the distance between Venus and the Earth is changing at any time.  In the history of the world in Yunyang, in order to explain this matter, people put forward a new theoretical model, but the impact was not great - some people said that the stars were orbiting the sun star, and then the sun star was orbiting the earth.  .  This can certainly explain the change in the distance between Venus and the Earth, but this model of universe operation is obviously unreasonable. Moreover, there is one most important phenomenon that it cannot explain. At this moment, Yunyang also plans to bring out this evidence.  Refuting the stubborn old man in front of me.  "Both Chang Geng and Zu Star are orbiting the sun star However, Chang Geng Star and Zu Star also have their own rotation. It is Zu Star that is rotating, so it creates the illusion that the sun, moon and stars rise in the east and set in the west, not the sun and the moon.  The stars are revolving around us. Let me give you another simple analogy When you are running fast, do you also notice that the things on the left and right are retreating quickly? " The argument between Yunyang and the old man has begun.  It successfully attracted the attention of the students, because what Yunyang described was a brand new world that no one had ever discovered before, and no one had thought of it.  Thanks to Yunyang's rich experience in teaching astronomy science classes to primary and middle school students, Yunyang is very good at explaining a potentially complex model in simple and easy-to-understand terms.  So when they heard Yunyang ask this question, several students nodded subconsciously.  Yunyang laughed with great satisfaction: "When you see things on both sides retreating when you are running, can you say that you are not moving, but the things on both sides are moving? Similarly, when we see the sun and the moon  Stars rise in the east and set in the west. Can it be said that the sun, moon and stars are revolving around us? This kind of taken-for-granted thinking is terrible, old gentleman." Yunyang looked at the old man meaningfully.  The old man blushed and still defended: "This evidence is not sufficient." "Okay, I will present another evidence." Yunyang nodded and asked the old man: "The old man concentrates on studying astronomy, and he must be in the astronomy department.  He is quite accomplished So, I wonder if the old gentleman has ever noticed the phenomenon of planetary retrograde? Well, let¡¯s just say Yinghuo is Mars.  The so-called Yinghuo regression means that in the sky, Yinghuo does not simply move from east to west. Sometimes when walking westward, Mars will turn around and return, then walk eastward for a while, and then  Then he continued to turn around and continued walking west.  The reason why Mars is used as an example is because Mars is the outer planet closest to the earth. The retrogression phenomenon is most obvious on Mars and is also the easiest to observe.  After Yunyang raised this question, the old man suddenly became weak.  The phenomenon of planetary retrogression is the unexplainable Achilles heel of the geocentric theory. Even if the geocentric theory can explain 10,000 phenomena, the geocentric theory will still have to be overturned in the face of the "black swan" of planetary retrogression.  In the history of Yunyang's previous life, the geocentric theory was finally defeated by the two killers of planetary regression and stellar precession.  "II do know about Yinghuo's regressionI have also discussed this matter with my colleagues, but we haven't found the answer yet" the old man murmured.  "Oh, let me tell you the reason" Yunyang smiled and shook his head.  Below, several students have begun to whisper: "Is this true? Will Yinghuo really regress?" "We have never paid attention to it before Professor Chen also said that he is studying this matter, so it is probably  ReallySonghe, Songhe, do you know?" Songhe was quite contented at the moment. Seeing others asking him, Songhe also shook his head disdainfully: "Don't make any noise, listen to Uncle Yun."  "It's very simple." Yunyang said, "If Zuxing, Chang Geng, and Yinghuo all revolve around the sun this is easy to explain, because different planets revolve around the sun at different speeds." Yunyang  As he said that, he clicked another point outside the earth, "This is Yinghuo." "When the Ancestral Star is behind Yinghuo, it will naturally move forward when looking at Yinghuo But the Ancestral Star moves very fast.  After the star surpasses Yinghuo, it looks like it is moving backwards. It's that simple. Well, when the ancestor star continues to move, it will look like Yinghuo has returned to its original orbit This is a very simple thing.  After all, all special phenomena are caused by ourselves moving, not by the sun, moon and stars revolving around us. Well, there is also something orbiting around the ancestral star, and that is the moon, because the moon belongs to the ancestral star.  Satellite."  After hearing what Yunyang said, the old man was stunned again. His cloudy old eyes kept moving rapidly, as if he was thinking about something eagerly.  After a while, it seemed like he suddenly understood.  "What is a satellite?" the old man asked quickly.  "Before we talk about satellites, let's talk about stars and planets Stars are big fireballs like the sun. Sunstar is very big. Sunstar is more than 300,000 times heavier than our ancestor star. Most of the stars in the sky are  They are all stars like the Sun Star, and then Zuxing, Chenxing, Changgeng, Yinghuo, Zhenxing, and Suixing are all planets, all orbiting around the Sun StarThen the moon orbits the Zuxing, and the moon is a satellite"  "You said that most of the stars in the sky are like the sun Then why do they look so small? So dark?" Yunyang glanced at the old man: "Because they are too far away from us This universe is very spacey.  Big When Songhe, Qin Wu, and Senior Brother Zhang and I went to Chang Geng, the Taiyu Golden Pagoda could advance 100,000 miles in an hour, but we still walked for several months" "Mr. Five,  What is there in space? " "Is Chang Geng really a big ball like Zuxing? Is there any mountain on Chang Geng? Are there any monsters" "How long does it take to go to Suixing?  "What are the stars like?" "Wow, there are so many stars in the sky. Are these stars like big fireballs like the sun?" The atmosphere in the classroom suddenly became lively, and many students raised their hands.  , asking Yunyang various questions, but the old man was left out in the cold.  No matter what the problem is, Yunyang always has it at his fingertips and can explain it clearly in a few words in easy-to-understand terms. In Yunyang's description, a vast and magical world is clearly presented before everyone's eyes.  "Zhenxing has a satellite There are also mountains and rivers on that satellite, but what flows in the river is not water, but a strange flammable liquid. This kind of thing will fall when it rains there." "  If there's a fire there, won't the fire get bigger and bigger when it rains?" a student said loudly.  This question immediately caused a roar of laughter, and the student sat down with a blushing face.  Yunyang also smiled and said: "It's not that wood will ignite a fire If you have a chance, you can go to the college kitchen and take a look. When the chefs there cook, the pots often catch fire, but the lid of the pot is closed  After that, the fire will be extinguished quickly, and it will not burn even if there is oil So, the fire will not burn on Zhenxing's satellite. " "Then what is missing" a student thought.  got up.  Showing the mystery of the universe to students, and then guiding them to engage in some useful thinking, was the main purpose of Yunyang¡¯s astronomy classes in school. Now, Yunyang has used this method again.  Yunyang did not tell the answer directly, but left the question to the students to think for themselves.  "The Sui Star also has a satellite. The surface of that star is covered with thick ice caps, which can be hundreds of miles thickand underneath the ice caps is the ocean, which is deeper than the deepest ocean on our ancestral planet  " "I haven't seen the sea" Yunyang was startled, and then he remembered that because it was too dangerous, most people spent their entire lives in Shenghua City. Let alone the sea, the lakes were probably all there.  Never seen it.  This topic was a bit heavy. Yunyang changed the topic smoothly and continued to talk about some strange and curious things, so the atmosphere quickly became lively again.  The old man has been ignored, and now he finally broke out.  "Quiet, everyone!" the old man roared, and the classroom immediately became silent.  Boss Yunyang looked at the old man dissatisfied.  The classroom atmosphere that I had finally stirred up was instantly extinguished by this old man.  However, the old man did not realize that he was being looked down upon. Instead, with a serious face, he cupped his hands and asked Yunyang: "I just thought about Mr. Wu's words and benefited a lotbut there is one thing that is still unclear. Mr. Wu, if Zu Xing and  Chang Geng is orbiting the sun, so why do all the stars disappear during the day? " Yunyang looked at the old man with an idiot look: "Light a big fire a hundred meters away, and then  Light another candle besides this big fireExcuse me, can you see that candle?" The old man looked solemn and slowly thought about it and replied: "I specialize in astronomy. Although I don't practice it, I still have a physical body.  The fourth level of cultivation is still thereif you are a hundred meters away, you can probably see the candle." Yun Yang couldn't help but feel embarrassed, so he hurriedly said: "Uh, a thousand meters away, a thousand meters away.Outside.  " "Thousands of meters away, you can probably only see a big fire and no candles.  "The old man continued to think for a while and replied solemnly. "Why?  Yunyang asked. "The fire was too bright and the candles were naturally invisible."  "So" Yunyang spread his hands: "The sun is so strong during the day, do you still want to see stars?"  "
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