Harov thought for a long time but came to no avail. Finally, he sighed, looked at Theresa and asked.

"Where is today's research material?"

"Here, teacher." Teresa handed over a pile of manuscript paper very respectfully.

Harof picked up a piece of parchment and started reading it. Although the various ideas proposed by these formal wizards were full of loopholes, they were imaginative enough that they could sometimes give him some inspiration.

After all, this is exactly what he lacks most right now.

Harof scanned the lines, then quickly threw it aside and picked up the next piece of parchment to read.

After reading more than a dozen copies, Harov's patience slowly ran out.

Because the quality of the theories in this issue is so poor, many theories have no factual basis at all and are just groundless fantasies.

It's just a waste of my time! Forget it, I'd better finish reading it first, maybe I can find some inspiration?

Harov shook his head, held on to the last glimmer of hope, and picked up the very exquisite envelope left on the table.

"Tell them next time to just bring manuscript paper. There's no need to make all these messy decorations." Harov said dissatisfiedly.

"Yes, teacher, I will remind them." Theresa nodded quickly, and she hated the wizard named Lin En from outside the wizarding land more and more, because the letter was taken from him.

"Huh?" After Harov casually opened the envelope, he was stunned.

Because the envelope was not filled with research papers on magic theory, but an invitation letter.

[Respected legendary wizard Mr. Harrof

I heard that you are studying the laws of the movement of stars and are committed to deciphering the secrets of gravity, space and time. I hereby invite you to join the [Secret Law Society] to explore the mysteries of the truth of the universe together...]

Harov frowned. He had no idea how many invitations from academic research organizations he had to reject every month, and now he got one mixed in with the research materials.

"I'm sorry, it's my fault, teacher. I should have reviewed it first." Theresa responded in a panic. This was her job, but because there was some delay before, she just brought it in directly.

"The Secret Society..." Harov didn't throw the letter away directly, because he seemed to have heard of this name somewhere. "Who brought this letter?"

"It was a wizard named Lin En, the wizard from the Sea of ​​Mist who came up with the planet theory." Theresa said indignantly. "That arrogant guy also said that he brought three laws and a formula that can solve the problem you are facing."

"What about the laws and formulas?" Harrov asked.

Since this wizarding organization can clearly propose the theory of planets and the law of free fall, it proves that they have some knowledge at least. It won’t hurt to take a look!

Theresa was choked up and couldn't speak...

Fortunately, Harov quickly found the formulas and laws written by Lynn on the back of the invitation letter.

[First law: The orbits of all planets around stars are ellipses, and the star is at a focus of the ellipse.]

After scanning the first line, Harov nodded thoughtfully.

This is also one of the problems that has always troubled him.

So Harov looked down in a hurry, but to his surprise, there was no explanation at all, but the second and third laws were directly proposed.

[Second Law: For any planet, the area swept by the line connecting it and the star is proportional to the time of motion, and the magnitude of the planet's surface-grazing velocity is constant.]

[The Third Law: The ratio of the cube of the semi-major axis of all planetary orbits to the square of their orbital period is equal, and the ratio is only related to the celestial body they orbit. ]

Harov's expression immediately became serious, because these were two brand new rules that he had not yet discovered.

"Hurry, bring paper and pen, I want to verify it." Harov shouted loudly.

Could it be that these so-called laws are really useful to teachers? Theresa felt a little uneasy in her heart, and she didn't understand why just three short sentences could make Harov, a legendary wizard, lose his composure so much.

Although she was completely confused, Theresa hurriedly took the paper and pen.

However, Harof, who could not wait any longer, used his magic power to write and draw in the air, and then took the data from the star maps to compare them one by one.

Theresa was so frightened that she dared not even breathe. She just waited there with a pen and paper, and she waited like that for several hours.

When it was light in the sky, Harov stopped and looked at the orbital data of the stars suspended in the air, muttering to himself.

"It fits, it really fits!"

Harov felt that he was closer to the truth than ever before.

So he looked at the end of the invitation letter.

There is a short one-line formula there.

F=GMm/r^ 2However, he couldn't understand these operation symbols at all! What does F stand for, and what is G? Harov knew nothing about these mathematical operation symbols from another world, and could only guess based on his previous research. He had a hunch that what he had been pursuing was in this short formula!

"Where is Lin En? Where is he now?" Harof suddenly remembered the person who sent the letter and asked anxiously. The other party must understand the meaning of this formula.

"Teacher, it was too late yesterday, so the wizard named Lin En went back first... As for now, he should be attending a seminar." Theresa replied hesitantly, not daring to mention that she had deliberately stopped him outside the door.

"I'll bring him here right away!" Theresa hurriedly planned to go out and bring Lin En back.

As for the previous conflict, she no longer cared about it.

Theresa knew very well that she was just a three-ring wizard with ordinary talent. It was because she provided some inspiration to Harof with an academic paper that she was appreciated and became his apprentice.

If this legendary wizard knew that he had made such a big mistake, he would probably lose his current position.

"No need, it's too slow. I'd better go there myself." Harov had a thought, and he sorted out the messy research manuscripts in the room and gathered them in his hands, and then flew out directly from the wide open window.

(End of this chapter)