Chapter 149 Isaac Deng

"Um……"

He Yan pretended not to see anything, and in turn joked: "What is written in it that is mysterious? It can't be a bad word about me, right?"

"No...no!"

Deng Ai looked at He Yan as if he really hadn't seen it, and his nervous heart gradually relaxed.

He Yan chuckled: "Forget it, I will accept even the bad words. Let's go! I'm in a good mood today and will take you to play outside the city!"

"Um?"

Deng Ai was surprised: "Is it like playing with a rope at that time?"

"almost."

He Yan took Deng Ai outside the city and asked him to look out into the distance.

The vast sky and the wilderness merge into one piece in the distance, and there is nothing special about it.

"Xu Bao, you drive the carriage to the horizon and try to go as far as possible."

Xu Bao immediately accepted the order and drove the carriage towards the sky.

"Xiao Ai, look at that carriage and don't take your eyes away."

"good!"

Deng Ai was not like an ordinary young man. He was very patient and kept his eyes on the carriage until it disappeared into the sky.

"What do you think?"

Deng Ai looked at He Yan confusedly and shook his little head.

"Why did the carriage disappear?"

"Because, because, because, because, the carriage has gone far."

"That means it's too far away and you can't see the carriage at all with your eyesight?"

Deng Ai nodded, not understanding why He Yan asked him this question.

"Xiao Ai, let me ask you, is the carriage farther away from you or the sun?"

"Since, naturally, the sun is far away."

"Then why can you see the sun but not the carriage?"

Deng Ai was stunned.

It makes sense! Why can’t you see the carriage that is closer, but you can see the sun that is far away?

He Yan pointed to the sun with one finger and pointed with the other in the direction where the carriage disappeared.

"Because there is no barrier between the sun and our eyes."

Deng Ai immediately understood: "What, what, your, you mean, there is an obstacle between us and the carriage, the carriage?"

"But, but, but, the ground is, is, flat, flat!"

He Yan chuckled: "Who told you that the earth is flat?"

Deng Ai opened his mouth, wanting to tell He Yan, "This is everyone's consensus!"

But when Deng Ai thought that "it is everyone's consensus to study Confucian classics", he was stunned in place, thinking about this problem with his not yet fully developed brain.

"The earth is not flat?"

"What is the shape of the earth?"

He Yan also directly told Deng Ai the answer: "You can look up Zhang Heng's "Notes on the Armillary Sphere". He has already proposed the concept of armillary theory in it, but this concept... is somewhat vague."

The sky is big and the earth is small. There is water inside and outside the sky, and the sky envelops the earth, just like a shell wrapped in yellow. Each of the heaven and the earth stands on the air, carrying water and floating. The sky rotates like the wheel of a cart, spinning around without any reason.

Zhang Heng's Huntian theory to a certain extent destroyed the deep-rooted astronomical view of the "Gaitian theory" in people's minds, but there is no evidence to prove it, so it is not widely recognized by the world.

Although today's "Horizon Experiment" provides theoretical proof, it still cannot be used as conclusive evidence.

Unless someone can really travel around the world and come back one day, there will always be people who don't want to believe it.

However, He Yan told Deng Ai that this was not to let him travel around the world, but to keep his mechanics research on the right track and not go astray.

"If the earth beneath our feet is spherical... then you should be able to guess where the "person" hiding under the earth is, right?"

Deng Ai swallowed softly: "Earth...the center of the earth?"

"Correct answer! As a reward, you help your Aunt Qiao take care of Sun Shao for one night! Your Aunt Qiao and I want to talk about business!"

Deng Ai had no time to pay attention to He Yan's bad taste, because his worldview was collapsing bit by bit and then reshaped bit by bit.

"The earth...is round?"

"We...live in a ball?"

"There is a special force in the center of the ball that can pull everything on the earth together..."

"This special force may be called... geocentric pull?"

He Yan: "..."

Now that we have reached this point, what can you say about gravity?

"Okay! Think about it slowly, don't burn out your brain. Cao Jie and Cao Pi are probably waking up soon. Call Cao Jie over to watch Cao Pi get beaten!"

He Yan also invited Deng Ai: "Do you want to go?"

"No, not anymore."

Of course Deng Ai also wanted to see Cao Pi beaten, but at the moment there were obviously more important things waiting for him to think about.

…………

An hour later.

Xu Bao (driving): Why won’t your Lord let me go back? If I keep running, I will run back to my hometown in Qiao County!

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Sikong Mansion, Mrs. Bian's residence.

"Let you go to the Nulu!"

"Let you go to the Nulu!"

"I'll beat you to death!"

"None of you brothers and sisters are worry-free!"

"Bah bang bang!"

…

He Yan and Cao Jie were hiding outside the house, looking inside intently.

Cao Jie took a breath of air: "He Yan, my mother is going to kill me this time!"

He Yan: "That's not the case, Aunt Bian has a sense of propriety."

A quarter of an hour later.

Cao Jie asked suspiciously: "He Yan, are you sure my mother is sensible?"

He Yan: "Um... how about we prepare a banquet?"

Another quarter of an hour later.

Cao Jie and He Yan were already studying the menu together.

"I want to eat braised soft-shell turtle, braised carp fillet, braised venison, pan-fried caviar and fried quail with orange shreds."

Cao Jie seemed to have thought of something: "Cao Pi loved grapes most during his lifetime, how about we join in?"

He Yan frowned: "Grapes are too expensive."

"Okay, then I won't add it..."

The two of them listed a total of eighteen dishes, and just as they were about to go out and start buying ingredients, Cao Pi suddenly limped out of the house.

"Huh?"

"Huh?"

Their eyes met, and Cao Pi suddenly got mad: "What's that disappointment in your eyes?"

"fine."

Cao Jie quietly hid the menu behind his back, planning to use it next time.

"He Yan, why did I suddenly go to my daughter's house?"

The beating that Cao Pi received was somewhat inexplicable.
To be continued...