Live broadcast: Ancient people accompany me to make up lessons

["Okay, okay, the first lucky audience member's questions are over, now it's the second person's turn."]

The anchor's voice woke up everyone who was immersed in the vast universe. Lucky viewer No. 2 was pushed by his senior brother and quickly asked his question and bowed to the sky.

"Ask the anchor, what impact does the movement of the stars have on us?"

He has been curious about this for a long time. In addition to observing the stars and observing the celestial phenomena, do the stars have any meaning to them? Do the Tianshu Stars really have other functions?

["Of course stars have a role to play." Xiaoxiao could tell several of the uses of stars without even thinking.

“The sun is a star, it emits heat and provides us with light and heat energy. Only with the sun can plants grow, other animals and our human activities can take place.

The moon is a satellite of the Earth that locks the tides of the Earth's oceans and slows down the Earth's rotation.

Jupiter is the earth's natural barrier. Countless asteroids that would hit the earth are captured by Jupiter's gravity, which helps us reduce the risk of extinction.

When there is no navigation, you have to rely on the stars in the sky to identify the direction. In a future where resources are increasingly scarce, we are bound to look for resources on other planets and even emigrate to the stars. "

Although the Western Fantasy World is not bad and the folk customs are relatively simple, Xiaoxiao still prefers his own world. Moreover, the fancy magic is too mysterious for her, but the visible technology excites her even more. 】

The stars have many functions, but Zou Gu is a little disappointed because he wants to know whether the stars are related to people's fortunes and even the general trend of the country.

The anchor said so much, made the role of stars clear and clear, and stripped away its mysterious veil... It seems that there is really nothing mysterious about stars.

Others also nodded, recognizing the importance of the sun and the moon. They need to know the direction. Who doesn’t know the North Star and the Big Dipper?

Liu Che pinched himself: "Interstellar immigrants? They can all go to other stars!" After the shock, he thought about it again. Since the earth is also a planet and they all live on this star, then people in the future can go to other stars. Life doesn't seem very strange...

No, it still sounds like a fantasy!

["Lucky Audience No. 3, it's your turn!"]

"Luoxia Hong, Tianmu is calling you, please ask."

Liu Che really wanted to ask Luo Xiahong to ask him what he wanted to ask, but out of respect for talents, he gave up the idea. He firmly believed that he still had a chance to win the lottery.

Luo Xiahong was overjoyed and bowed to the sky: "I dare to ask the host how he can observe the stars so clearly."

As soon as this question was asked, countless astronomy enthusiasts praised it in their hearts. They have also been curious for a long time about how they could see so far away, the size and color of the stars, the nebulae one after another, the huge Milky Way...

How on earth did I see such a good record!

["Stargazing, we all use telescopes."

She pointed in front of her, and the system cooperated with the camera shift. A long white object was placed on a tripod and placed in the corner.

"There are many kinds of telescopes. Mine is a home optical telescope. It can be used to see Saturn and Jupiter, but it has not been used for a long time. Those that can observe such a distance are generally professional space telescopes."]

Under the sky, everyone looked at this ordinary "telescope" in surprise. Many astronomy enthusiasts were red-eyed and wanted to use this "telescope" to have a look. They also want to see Saturn and Jupiter.

And if you haven’t used it for a long time, it’s too much of a gift. Can you lend it to me if you don’t need it?

And the professional space telescope, can you tell us in detail?

["Space telescopes are also classified, including optical ones, capable of direct observation, and those capable of spectral analysis."

This little kid felt that he couldn't explain it clearly, so he simply found a video introducing famous telescopes and showed them to them.

Within two minutes, one famous telescope appeared after another, with the time, number, and shooting distance written on them one by one. 】

One after another, novel telescopes have refreshed everyone's understanding. Some are for direct observation, and some are for observing light waves. Even a huge iron pot-like thing built in the mountains and forests is actually a telescope.

In addition to being happy to see the familiar locals and Yourong Yan, more people were amazed at the cost of building those telescopes.

To put it bluntly, it can cost hundreds of millions, which is really more expensive than their national treasury.

If you want to say that their money is not valuable, a watermelon can only cost a few yuan per catty. No matter how cheap their watermelons were, based on the prices of peaches and plums they had at that time, one dollar might only be worth one or two cents at most, and it was clear how much it was to several hundred million.

Will the people of future generations be so rich that they engage in such money-burning things... Several people in power have doubts in their lives.

Luo Xiahong watched carefully and became frustrated. He couldn't build that telescope that flew away from the earth and was pushed into space. Even if he built it, he couldn't get out of the earth.

I hope someone else will ask the anchor how to build a telescope. If you're not greedy, just host the home version. If you know how to do this, they might have room for improvement in the future.

["Lucky Audience No. 4, please speak." Xiaoxiao feels more and more like a host, but the progress is much faster than last time, very good, keep it up. 】

Zhang Heng also bowed according to the procedure and asked: "Anchor, how do you measure the weight of the planet?"

When he was reading the paper before, he noticed that there were multiples of the planet's mass in the astronomy questions, and he always wondered if they could calculate the weight of the earth.

Others who are not professionals and enthusiasts: Help, what is the problem? I feel confused when I hear it!

[Xiao Xiao tried hard to clear his mind and said: "If the planets in the solar system have satellites, generally we calculate the planet's weight based on the satellite's orbital period and orbital radius, and then use the gravitational formula to calculate the planet's weight, or based on the gravitational interference of the planet on other celestial bodies. Observation data from man-made aircraft to aid measurement.

For planets outside the solar system, we can calculate a rough range based on the swing period and amplitude of the star, or by observing the planet's radius, inferring its composition. ”]

Most of the people under the canopy: dizzy, dazzled, and their brains hurt. What else could she say?

Others: Can you be more detailed? What is the gravity formula? Man-made aircraft can probably understand it, but how to calculate it specifically?

[I also realized that my statement was too general, so I gave an example.

"The earth I live on has a mass of about 5.965 times 10 to the power of 24 kilograms, which is almost 60 trillion tons. The sun is 30 times the mass of the earth." The system quickly posted a weight conversion and asked them to use their brains to do the conversion.

"This is the formula..."

"So the mass of the earth is 9.8 times r squared divided by G. The mass of the sun is like this... You also need to add Kepler's formula..."]

Who am I, where am I, what am I doing?

By this time, ordinary people who have no talent or love for mathematics, astronomy, or anything have quit the group chat. They feel that what the anchor talks about is a heavenly book, which is even more difficult than the wordless heavenly book in mythology.

What formula, what weight, radius, I don’t understand at all!

Although they don't understand it, knowledgeable people still struggle to write down it and write it down. If they don't understand it themselves, what if future generations can? We must know that the wealth of knowledge is the most precious.

Ying Zheng has already lowered his head to read the memorial. These things may be useful and profound, but they are of no use to him for the time being, so he should continue working.

However, he did not forget to tell Fusu to call him when he saw something useful to Da Qin, and also asked someone to pass the message on to the other children, asking them to learn from it.

Liu Che is also a standard liberal arts student. The stars are mysterious and interesting, but the calculation formulas are not pretty at all. He gave up thinking and started to empty his eyes like everyone else in the court, looking at where Luo Xiahong was recording excitedly.

Zhang Heng was very happy. He felt that he was indeed lucky today, otherwise how could he have asked so many things about the anchor! And she was able to start the lecture without looking up the information, which showed that she knew all the knowledge by heart and didn't even take the test paper.

System: So what? If you want to take the test, you should wait for the physics paper.

Li Shimin had given up thinking and began to copy the formulas and numbers one by one, and gave them to his two most beloved sons.

"Gao Ming, just take a look, Qing Que, see if you can learn it."

Cheng Qian is the prince, so you can just see it and don't need to learn it. Tai'er has always been smart, what if he knows it.

For the first time, Li Chengqian didn't feel uncomfortable because of Aye's respect for his younger brother. The stars are beautiful, but this knowledge is too difficult, Qingque, you are the smartest, study hard!

Li Tai: ...Is it possible that what I am smart about is the subset of classics and history, not these formulas...

Confucian scholars after the Tang Dynasty wanted to scold this as a nonsense, but those high-yield methods yesterday had established the authority of Tianmu in everyone's hearts. Even if they felt that this kind of knowledge was useless, they did not dare to scold it publicly.

The more Shen Kuo listened, the more his eyes shone, and he kept writing furiously. He already had an idea of ​​what he wanted to ask.

Zhu Yuanzhang looked at his sons who bowed their heads one by one and wanted to curse, but the officials in the court all bowed their heads and dared not speak.

Except for one or two from Qintian Prison.

Come on, needless to say, everyone can’t do it either.

Lao Zhu is thinking about whether to write down these things and let others learn from them.

What is the use of knowing the knowledge about these stars? Compared with yesterday’s rice grafting, it is far behind, but the anchor rice still needs to find information. These stars talk endlessly, and you can learn very well just by looking at it. .

This is something that anchors have learned well...

Zhu Di: Remember, remember everything! He felt that his Yongle ceremony could use something more.

Zhu Houzhao was also writing vigorously. Although his hobbies are raising pets and taking back military power to fight in wars, stars and other things are also very interesting. He finds it interesting and not difficult.

Zhu Houcong was also writing vigorously. Anyway, he had already asked the anchor his question, and he didn't expect the descendants of Wuhou to find a solution for him in one day. Xingxing was really interesting, and he didn't find it difficult. What's more, this is not the knowledge of gods, what is it!

During the Kangxi Dynasty, Yinreng, who had nothing to do, was also taking a pen to calculate the quality.

It's not like they haven't learned these things before, but they just learned basic mathematics, which is really not that deep. At least they can't calculate the weight of the earth and the sun.

His father, Kangxi, was also doing the calculations and was very satisfied with his accurate figures.

The sons who were called over by him also took pens to write and draw, but they had only studied mathematics, and their math talent was average. Their calculations were slow and exhausted.