"Recklessness" is the source of the legend of the world, and Pangu has a fight with the world.

After the establishment of the observatory, the legend that the sun and the moon are a piece of cake was basically debunked, and after observation, the rotation of the two moons could not be synchronized with the earth, which means that the moon was not captured by the gravitational force of the planet, and the back side was not always invisible, so the daily rotation changes of the front side of the moon can be clearly observed and recorded.

Through the change of the rotation of the lunar surface, the fact that the moon is a sphere is established, and combined with other related observation methods, it is deduced that the planet in which people live is also round.

In this regard, it has been recognized by the Ligong faction and Si Tianjian, and a planetary chart was also made, which is kept in Yongxing University Hall.

Gongliangxiu has traveled back and forth to Xianguo many times in the past few years, and he has not taken it seriously when he knew that Bailiyan was building an observatory, and Bailiyan believes that even now, Gongliangxiu still does not regard celestial observation as a serious matter, after all, this kind of investment with neither economic nor political interests is dispensable.

As he spoke, Mooney had an argument with the entourage of the Jinxuedi over whether to go up or not to go up the mountain, apparently seeing the "ugliness of the moon god" was not part of the trip, and the accompanying priest who was in charge of monitoring it did not approve.

The dispute lasted for a moment, and Bailiyan really couldn't stand it, so she stood up and went forward:

"Your Excellency Mooney, it's not so difficult to get up the mountain."

"It's none of your business!"

Mooney ignored him and continued to argue with the priests. Bai Liyan interrupted them and continued:

"If you don't look at it, let's go."

At this time, Gudapa said in frustration:

"Alas...... What a pity. ”

"Nothing to worry about." Bai Liyan took over and said, and then said: "People live in the world, do something and do nothing, how His Excellency Mooney thinks, he has his own reason, let's go." ”

Bailiyan turned to leave, but Mooney shouted to him:

"Wait! I want you to promise me one condition. ”

"Just to go up the mountain to see the moon, if you want Benhou to promise you a condition, it's not suitable. But for the sake of trade between the two countries, Your Excellency will first talk about it. ”

"There are two largest telescopes on the mountain, and you have to bring one of them back to us."

Mooney was startled when he said this, and his color changed a lot, and he blurted out:

"Do you know how much the two telescopes on the mountain are worth?"

Mooney asked sharply, and hurriedly asked:

"How much?"

"Regardless of the money and food, it takes eight months to make only one machine, and only two units will be built in three years.

The processing of two 100-fold large-aperture telescopes on the mountain is extremely difficult, subject to the constraints of glass processing technology, the larger the diameter, the thicker the size, and the simple traditional mold casting can no longer meet the quality of glass.

A total of 45 pairs of concave and convex lenses were processed before and after, and as many as 52 pieces were scrapped due to deformation, heating, uneven force, stress, bubbles, impurities, etc.

In order to meet the transparency, it is still necessary to use volcanic stone to artificially grind the mirror surface in the later stage to make it transparent like water, and the construction period is extremely long.

In the end, only four pairs were qualified to go off the assembly line, and one of them was transported to the top of the mountain with too large temperature difference between day and night, and the stress cracking of the overly thick lens was scrapped. Another pair of concave lenses accidentally fell off and were damaged, and only two pairs were successfully installed on the top of the mountain and put into use.

The total cost of molds, labor, loss and processing amounted to more than 600,000 Singapore dollars, which was converted into two telescopes, and the unit price of each unit was more than 300,000 yuan, of which more than half was paid by Bailiyan himself.

Now Mooney opened his mouth to be one, not to mention whether he paid or not, God blessed if he could move down to the top of the mountain intact, where could he travel thousands of miles back to the south.

"Your Excellency Mooney, if it weren't for Ben Hou to deceive you, the cost of this one would cost more than 300,000 Singapore dollars, I can't guarantee that you can transport it back to the south intact, can you afford this money?"

"If you don't agree, then let's go!"

Mooney had a dark old face, and he didn't actually believe Bailiyan's nonsense in his heart. So he turned around and was about to leave, and then Baili Yan turned around and said:

"However, there are slightly smaller binoculars on the mountain, which can also see the moon, so Ben Hou can consider sending a few pairs to Your Excellency. How, should you consider it? ”

"How small is slightly smaller?" Mooney asked warily.

"What your country seized was a quadruple telescope back then, and Benhou can be the master of giving your Excellency a twenty-fold telescope."

"But isn't the largest on the mountain a hundred times larger!"

"Hehe, you know that clearly. But don't think that a hundred times or twenty times is just a difference in numbers, and the method of production is very different, so I advise you not to be too greedy. ”

"Isn't there a bigger one?"

"Nope. A hundred times the mirror, twenty times the mirror, whether you want it or not. ”

Mooney hesitated, and the priest beside him babbled on and on. Gongliangxiu stepped forward and pulled Bailiyan aside:

"You don't sell twenty times the mirror, but now you give it back to them, aren't you afraid of harming the Central Plains in the future?"

"Don't worry, Brother Gongliang, selling it to other countries is the scourge of the Central Plains, and giving it to the people of Jin Xuedi is useless."

"Why is that?" Gongliang Xiu is puzzled.

"Secret, don't say it, hehaha......"

At present, only four-fold and eight-fold telescopes are sold to the outside world, and 12 and 16 telescopes are controlled, and 20-fold telescopes are forbidden to be exported.

In war, the horizon determines strategic decisions and intelligence information, and whoever has a wider horizon can gain more initiative.

Before the appearance of telescopes, the scale of the Central Plains princes' confrontation was only more than 200,000 people at best, and the two sides each led 100,000 to 1230,000 people.

After the appearance of the telescope, the total strength of the two sides of the country increased sharply to 300,000 to 350,000, and when the southern border was at its largest, the coalition forces simultaneously mobilized nearly 400,000 people to fight in a concentrated battlefield, taking advantage of the superiority of the field of vision to concentrate their forces to attack more and less.

But in other words, for the sake of profit, the capitalists will end up selling the rope that hangs themselves, and Bai Liyan certainly does not want to lift a stone to shoot himself in the foot, and it is an inevitable result to restrict the export of higher magnification telescopes to other countries.

As for giving Mooney for free, it's not a free gift at all.

At present, the main material of the lens is still silica, calcium sodium glass and other early glass lenses, after high temperature melting casting, its physical stability is not as good as natural crystal, after more than ten years or even twenty or thirty years of use, the crystal structure begins to weaken, ordinary temperature changes and wind and sun, the glass surface will become very brittle and hairy, the light transmittance decreases significantly, the field of vision becomes blurred, is a typical easy aging glass.

If Mooney takes the Twenty Times Mirror and wants to go to war, it is not possible for twenty or even thirty years, at least not in this generation of the Moon God King.

This means that after 30 years, the 20x mirror can be reused, but without replenishment and production capacity, it will not be able to withstand the consumption of the war at all.

What's more, thirty years later, what will happen to the Xian Nation, Mooney doesn't know in his heart that the Jinxuedi people have obtained twenty times the mirror, and there is not much military use at all.

It is of no other use than to deal with the rebellious rebels of the Central Plains. On the contrary, if you fall into the Central Plains vassal states, you will immediately suffer retribution from the present world, so you have to look at the deep-seated reasons.

As he spoke to Koryoshu, Mooney seemed to have made some sort of compromise with the priest who accompanied him. Because of the slang they spoke, Bai Liyan couldn't quite understand what they were talking about.

"May I agree to your request, can I go up the mountain now?"

"Figured it out so quickly, your priests won't curse you."

Bai Liyan sneered, and Mooney always had a dark face:

"Our business has nothing to do with you, let's go."

"Okay, you're old, it's a little cold on the mountain, climb the mountain more leisurely."

"I'm not old enough to need you to carry it."

Bailiyan couldn't remember how old Mooney was, but he was certainly fifty years old. He was only less than forty years old in the Northern Expedition, and he was the youngest and most promising regiment commander in the Jin Xuedi People's Four-Way Army.

Miaotian Mountain from the foot of the mountain counts, the mountain is 695 zhang high, nearly 2,000 meters or so, the cumulative plain elevation is more than 2,200 meters, there are stone steps that are artificially built and laid up up and down the mountain, after two widening and trimming in 636 years of Shengyuan Dynasty, now six people can walk side by side.

Affected by the climate and the strong wind of the North Sea, there is frost on the mountain in all seasons, and the temperature on the top of the mountain falls below zero degrees in winter.

Due to the real loss of life and money, after the decline of the national strength of the Xian country, it was rarely transported back to the ice by jumping into the ice. However, every year in the hot summer, Miaotian Mountain is a holy place for summer vacation, and nearby villagers will also go into the mountains to hunt or escape the heat.

The group began to climb the mountain, and it was four o'clock in the afternoon when they stepped on the altar.

The topography of the top of the mountain is roughly divided into two kinds, the mountain peak stone forest in the northeast and the flat land in the southwest, the mountain peak stone forest is about more than 20 meters higher than the flat land, the dojo with the practice is excavated in the middle, the area is less than 200 square meters, the stone steps can be used up and down, the dojo is placed with a bronze tripod, a pair of stone cases, used for the ritual of sacrificing to the sky.

The southwest flat land area is one and a half acres, there are wooden buildings built in the early years, for rest and viewing, and then burned down by the Black Turban Army, after Bailiyan took over, the land was re-leveled and repaired Yuntai Pavilion. Three years ago, it was re-expanded and reinforced, and a steel-core cement guardrail was added around the cliff.

At this time, two huge telescopes, one east and one west, sat in the preset dome brick and concrete building, only revealing a huge caliber aimed at the north and south of heaven and earth.

"So huge, just to see the moon?"

Gongliang Xiu couldn't help asking, and Bai Liyan joked:

"Also look at the stars and the sun."

That's when Mooney said:

"Can't this thing be made smaller?"

"Yes, the same hundredfold can be made so small." Baili Yan gestured for a while, about eight or nine centimeters, and then said: "But the effect will be very poor, so it can only be made larger and longer, which is more convenient to use." The specific details are also clear to Master Gudapa and Figos, you can ask them. Let's go, go and see first, you can see more clearly after dusk. ”

Theoretically, an eight-centimeter aperture telescope can achieve a 160-fold limit, but the problem is that at this time, the convex lens is infinitely close to the spherical, and the concave lens is thinner in the center, so the convex lens can be infinitely close to the spherical, while the convex lens cannot be infinitely thinner, this kind of telescope can only see far, and the focusing ability is limited, which is also the biggest disadvantage of the refracting telescope.

If the situation is improved with a reflecting telescope structure, the increase in the mirror and reflection angle will expand the aperture. At the same time, the smaller aperture is not conducive to the observation of celestial objects in a large area. Therefore, a trade-off was made between focusing, aperture, and multiple, and finally the telescope was made larger.