As Amy said, this "trial" given by Dust is a rare free time for Ella.

Most of the time, Ella is very busy, especially in the late night when it is quiet. After dealing with government affairs for a day, Ella has to spend several hours in the study, processing numbers that only she can understand on the stacks of manuscript papers.

Since Ella returned from the Island Republic, she copied a copy of the alchemy documents she had written in her mind to Paracelsus, and then she never touched alchemy again. In Amy's impression, in addition to dealing with those numbers, she always held the "Eye of Hermes" made by her and looked at the stars all night long.

At this time, Amy could feel that the Aila, who was criticized by her as "pretty depraved", was still the same Barcelona as before.

"Your Majesty, don't you study something more interesting?"

Amy asked after bringing Ella an evening snack.

"Interesting thing?" Ella raised her head from behind the pile of books, "What does it mean?"

"Before, His Majesty shot a slingshot on Nagilfa. The result was that it was the same whether it was directed to the direction of Nagilfa's navigation or against the direction of Nagilfa's navigation. In addition, when throwing a stone upwards on the galloping carriage, the stone would fall back into his hand, rather than being thrown behind by the carriage; in addition, when the long ship sailed quickly, the sail would fall directly under the mast, not directly behind the mast. These results were incredible and interesting..."

"Incredible is quite incredible. These results show that no matter whether it is a sail or a stone, when it is leaving the boat and the carriage, it is still moving forward at the same speed as the boat and the carriage. It is obvious that after leaving, it is not affected by any force... But it is not fun at all! Force is not the reason for movement, so what is the reason for movement?" Ella pulled her hair in a little annoyed, "I can't understand this matter, so I can only hide and not think about it for the time being. When you mentioned it, Amy, my head started to hurt again!"

Seeing that Ella was about to pull her hair off, Amy hurriedly stopped her and said, "Then I don't think about it for the time being! When I was a child, I threw it aside and ignored it. Then when I grew up, I understood it. Your Majesty is still young, and maybe I will figure it out in a few years?"

But Ella seemed to have not listened to this at all, and her expression seemed increasingly distressed. Amy had to find a topic to draw her attention: "Your Majesty, what are you writing on paper now? I see you have been drawing circles there for several months."

"That's the last lesson I'm going to teach the first graduates. Amy, you can't understand."

"What, what!" Amy shouted, "The first graduates, aren't they all pirates from the Pirate Kingdom? Does Your Majesty think I'm not even as good as these savages?"

Ella rolled half her eyes from the table and asked, "Amy, what are you going around us every night in the sky?"

"Five gods! They are Aphrodite, Hermes, Ares, Zeus..."

"So, Amy, you don't understand at all! Those pirates could calculate the trajectory of the planet before entering university. In Antilia, Hestein only miscalculated the position of the solar vernal equinox! I think Amy, who is better than these pirates, only has his breasts!"

"Your Majesty, I'm not convinced if you say this! I know the rules of the gods' operation!" Ella's provocation made Amy forget his original purpose, and brought a stool to sit in front of Ella. "Your Majesty, why do you ask those pirates? Just ask me here! It took several years for those stupid pirates to graduate, and I can answer it now!"

"Um... OK then."

Ella took out a new piece of manuscript paper and began to write and draw in front of Amy.

"First of all, Amy, those five planets...just be considered as five gods, how do they run in the sky?"

"It's so simple! With the earth we stand on as the center, the five gods, together with Apollo and Artemis, are all moving around the earth in a circular motion!"

"It's wrong. It's not the center. Our land is a little bit off the center. These "gods" do eccentric circle movements. Otherwise, it will be completely incompatible with the observed data." Ella looked at Amy with pity, "This is what the people of the Qiqiu Empire knew seven hundred years ago? Seven hundred years behind, Amy, you are actually a barbarian..."

"It's just that it's convenient to say it! Isn't it the same! Your Majesty can only pick words on such small details?"

"Well, Amy, the second question: How do you prove that these celestial bodies are doing circular motions?"

"This...is to prove it?"

"Of course it is to be proved. Aristotle made a very simple proof. He said that the birth of objects is due to the existence of some opposition in the object itself, and the extinction of objects is due to the transformation of one opposite of the object into another opposition. The birth and death of objects only appear when there is an opposition in the object. The celestial body is immortal, so the celestial body has no opposition. Anything that is neither born nor destroyed is excluded from any opposition."

"That's right!" Amy echoed, "There is no opposition, no increase, no decrease, no change, no change, so the celestial bodies are eternal. Only the gods are immortal and eternal..."

Ella ignored Amy's words and continued: "Then Aristotle pointed out that there are only three types of movements, circular motion, linear motion, and mixed motion of circumference and straight lines. The first two are simple motions, and the last one is mixed motion. In simple motion, circular motion surrounds the center, linear motion leaves the center or tends to the center. Leaving the center and tends to the center are obviously an opposite. Since the celestial body has no opposite, then it can only do circular motion."

This chapter is not finished yet, please click on the next page to continue reading the exciting content behind! "Aristotle is so powerful... no, not at all! Gods circling our world to make circular motions, which is nothing to prove! Isn't it?"

"No need for proof? Amy, you should also know that sometimes, these celestial beings will suddenly appear in the sky, right?"

"Woo... there are indeed, probably because the gods are angry..."

"Except for you, you can explain this if you just pull a pirate out of the university now." Ella sighed and drew a schematic diagram of Amy on the manuscript paper. "It is true that it is a circular motion, but it is a composite motion of multiple circular motions. The large circular orbit is called the 'horizon', and the small circular orbit is called the 'this wheel'. This is a system established by Ptolemy, an astronomer of the Seven Hill Empire, seven hundred years ago. As long as a few of this wheels are added outside the horizon, it can explain all the celestial movement phenomena observed at that time. It is not an exaggeration to call Ptolemy the 'sky legislator' alone."

"Well... I haven't learned this, but I've learned it now!" Amy argued dissatisfiedly, "It only took me a few minutes, and those pirates have been learning for a few years! I'm much smarter than them!"

"Have you learned it? Are you sure?"

Ella took away the manuscript paper she had given Amy, and then piled up the stack of data she had calculated before in front of Amy. It was also the orbital diagram of the star body, but the number of circles drawn on it was dozens of times that of the manuscript paper I had shown to Amy before. Each of the dozens of papers below the orbital diagram was densely written with Ella's observation records of celestial bodies.

"Using the Eye of Hermes, I greatly increased the accuracy of astronomical observations. With this accuracy, the Ptolemy's digits and the average round can no longer explain the observation results. I had to add a new round to fit the observation results. Just now, I have increased the number of rounds to seventy-six. Then there are my new observation records, which are also interesting... Amy, how long are you going to learn this?"

"This... Your Majesty! Why are you doing that complicated?"

"Silly Amy."

Ella sighed again. She was not happy because of the victory of the argument, but seemed a little disappointed.
Chapter completed!