met free Page 2126
Page 2126
It also represents the virtue and fortune of successive dynasties.
This was the cause of the court debate.
Planetary retrograde,
In ancient times, it was a key aspect of astrology in various countries.
The "Mercury retrograde" often referred to in later generations is actually Mercury retrograde.
As early as the reign of Emperor Wu of Han,
The retrograde motion of the five planets is considered a normal astronomical phenomenon.
However, the popularity of the theory of interaction between Heaven and humanity
And Wang Mang's extensive use of apocryphal texts,
However, it was a major step backward in the development of astronomy.
By the Song Dynasty,
Shen Kuo summarized an algorithm,
It can roughly calculate the trajectory of planetary motion.
Huang Shang drew a heliocentric model on the ground.
Pointing to the two planets, he said:
"This is the earth, this is Mars."
"They all revolve around the sun."
"The Earth is closer to the sun,"
"Fireflies are farther from the sun."
"When the earth surpasses the fireflies,"
"If a person observes from the ground,"
"Then we discovered that Fireflies were moving in reverse."
"Actually, Fireflies has always been moving forward,"
"It's just slower than the earth,"
"So it looks like we're going backwards."
Wen Huanzhang carefully observed the model on the ground.
He quickly asked again, "According to this explanation,"
"Venus orbits the sun faster,"
Why does Venus also retrograde?
This is really hard to express verbally.
Huang Shang untied his belt.
Two astronomers were tasked with simulating the orbits of Earth and Venus.
He used a belt to connect Earth and Venus.
And draw the trajectory with pebbles at a certain point on the extension line.
There's absolutely no need for further explanation.
Huang Shang didn't say a word.
Everyone understood just by looking at the drawn trajectory.
Zhai Ruwen asked, "If we take the sun as the center,"
Do you have a method to calculate the movement of the five planets?
There are two types.
Ma Hui asked his subordinates to bring over a stack of manuscript paper.
Zhai Ruwen opened it and took a look.
What came into view were the three laws of planetary motion.
This is not something that can be mastered in a short time.
Zhai Ruwen took the manuscript into the house.
By the light of the oil lamp, he earnestly comprehended the teachings.
Wen Huanzhang, however, walked to the astronomical telescope.
Li Yi helped him adjust the lenses and angle.
Wen Huanzhang peered intently through the binoculars.
I couldn't take my eyes off it immediately.
"how?"
Li Bangyan was just there to join in the fun.
Wen Huanzhang sighed, took two steps back, and said:
"You shall observe for yourself."
Li Bangyan bent over and observed for a while, then sighed:
There is no Moon Palace, nor is there Chang'e.
"I've seen the true face of the moon,"
How should I compose poems and lyrics from now on?
"But I don't want to write about the moon anymore."
Zhong Shidao also curiously joined in.
After observing for a moment, they quietly withdrew.
One official after another,
They took turns going forward to check.
Today is just the first wave.
Arranged in order of rank
For the next two weeks, there were people coming.
Wen Huanzhang pondered for a moment and asked:
"That is to say, the sun, the moon, the earth, and the five planets,"
"Are they all floating in the void?"
Ma Hui nodded: "Indeed."
Minister of War Zhao Yu asked:
"Why can it revolve around the sun?"
"Aren't they going to scatter in other directions?"
Ma Hui explained: "The commentary on Zhang Heng's armillary sphere states:"
“‘The sky is like a chicken egg, and the celestial bodies are as round as bullets.’”
"The first half of the statement may be wrong, but the second half is true."
"Including the earth beneath our feet,"
"It's also a pellet in the void."
"The current Holy Emperor has instructed: All celestial bodies have gravity and can attract each other."
"Everything falls because of gravity."
"The sun's gravity is the strongest,"
"The Earth and the five planets are attracted and revolve around it."
Huang Shang used that belt to tie stones.
And then he grabbed the belt and swung it around:
"My fist is the sun,"
"The pebbles are the Earth's surface, they are the five planets,"
"The belt is an invisible force of gravity."
"The sun remains still, and everything else revolves around it."
Chen Dong is here tonight too.
He clenched his fist, observed it for a moment, and then asked:
Is the earth not a sphere?
"Even if the earth has gravity,"
"The person on the other side of the ball won't fall into the sky,"
"But do they live their lives upside down forever?"
Shen Wei laughed and said, "People from the other side of the earth."
"If one knew these things,"
"Such questions may arise."
Li Yi said, "The earth is big enough."
"It's so big that we don't even know it's a sphere."
"So people everywhere,"
"Everyone felt like they had their feet firmly planted on the ground and their heads under the blue sky."
Everyone seemed to be deep in thought.
It was hard to accept at first.
Chapter 1883 The Five Elements
Qin Hui also clenched his fist and observed:
"If you were to sail out to sea from Hangzhou,"
"Keep sailing east,"
"Is it possible to return to Hangzhou?"
Ma Hui said solemnly, "The Emperor says it's acceptable."
"Where's the moon?" Zhao Ding asked.
Shen Wei explained, "The moon is very small; it revolves around the earth."
"Solar and lunar eclipses are also derived in this way."
Shen Wei lay prone on the ground.
Li Yi went over to help.
The two demonstrated the relationship between the sun, moon, and earth together.
It also explains the causes of solar eclipses, lunar eclipses, and tides.
The officials looked at each other in bewilderment.
They really wanted to argue.
But they didn't know how to refute it.