At this time, the sun was in the west, Bailiyan led everyone to the west side of the observatory, in order to facilitate the observation of the sun, all telescopes are equipped with black lenses to filter the strong light, each person should not observe for more than half an hour a day, by the Si Tianjian and the Gonggong faction jointly managed.

In charge of the observatory on the west side is Master Chu Mofei of the Ligong faction, a middle-aged man under forty, who was one of the first new masters in Zuomen to receive advanced mathematics education that year.

Seeing Baili Yan coming, Chu Mofei stepped forward and saluted:

"I've seen Yongxinghou."

"Master Chu is exempt. Today, there is Jin Xuedi's delegation to observe the moon, Master Chu should know. ”

"A few days ago, we got the news that several telescopes are ready to use."

"Hmm. Go and get the last three months of observations and I'll see everything else. ”

"No."

While talking to Chu Mofei, Gudappa and Figos Weng's son-in-law led Mooney to use a 20x telescope to observe the sun through the black lens, which showed Mooney's expression was at a loss, but he quickly found some kind of "flaw".

"Why do you want to paint the lenses black, is there something on them?"

"If you look at the sun for a long time, your eyes will be blinded, and with black lenses, you can see for a longer time, but not for a long time."

Gudappa explained that Mooney would be skeptical, and that he was still stubborn that the telescope with black lenses was for manipulation.

When he was young, Chu Mofei took the observation records of the last three months, and wrote them in great detail in a thick stack. Bailiyan asked Chu Mofei while flipping through the contents:

"Have you spotted a meteor lately?"

"Half a month ago, I found that there was an epidemic crossing 35 degrees south-west, and it seems to be very large."

"Thirty-five degrees south-west...... Baili Yan frowned thoughtfully, trying to outline the territory of the Central Plains, and said in a young time: "According to this calculation, it should pass through the sky above Sangnan, Qingtian, Ganfu, Dekang, Changyin, and Helong counties, and should be observable." ”

"Yes, but it's hard to say where it ends up."

Chu Mofei's words were full of pity, obviously planning to find the meteorite.

At that time, Tang Zhao, Song Jie and others went to Changsun to transport a huge ferromagnetic meteorite to the Ligong faction through Guangxin, and after the Black Turban Army broke through the main hall of the Ligong faction, the meteorite was not transferred in time and was transported to Tiandu by the Black Turban Army, and then its whereabouts are unknown.

But most of them were regarded as the treasure of the town by Wei Guo, and they were hacked into their own pockets. In this regard, the Gonggong faction has been thinking about retrieving or discovering another meteorite.

Constantly flipping through the observation records, Bai Liyan's eyes looked at him from time to time, and one of the consecutive appearances in the record immediately caught his attention:

"Master Chu, why is there a record of 'seeing the blue moonlight every day', what does this mean?"

"Oh, that's right, about half a year ago at dusk, in order to facilitate the observation of the moon at night, when I removed my sunglasses, I accidentally found a blue shimmer on the right side of the sun, which was extremely faint, and I couldn't see it clearly in my sunglasses, so I could only observe it with a naked mirror."

"Shhh...... And things like that! Baili Yan was surprised, and asked again: "Can you see it every day?" ”

"It can be seen every day, but it can only be seen in a naked mirror at dusk and dawn, when the sun is weak, and it cannot be seen clearly in ordinary times."

"Has that changed location?"

"It doesn't seem to be, it's in that position every day. But...... After all, the distance is too far, and the huge sphere is extremely far away, and any deviation is difficult to observe with the naked eye. ”

"Bring me the earliest records to peruse."

"No!"

Bailiyan was only worried that the wolf didn't send it away, and the evil tiger came again. The civilization of the Central Plains is not yet strong, and the northern hemisphere is eyeing it, and it will not be a good thing to jump out of thin air to visit in an extraterrestrial plaintext at this moment. He was stunned that he was the Monkey King in his last life, and he didn't know how to do tricks like the palm of the Buddha.

Being able to spot a spot of light near the Sun with the naked eye and keep it for months is either a powerful flying device that extracts energy from the Sun's surface near the Sun, or a celestial phenomenon. If the former is the former, they can obtain energy on the surface of the sun, and to destroy a small bronze civilization, the end will be simpler than an elephant shooting an ant to death.

From September last year, in the past seven months, except for the first few days and rainy weather, and then half an hour before and after dawn and dusk every day, under the naked mirror, it can be found with the naked eye that there is a hidden blue spot on the right side of the sun, with uniform chromaticity, neither particularly strong nor particularly weak, and it has continued unchanged for seven months.

While talking to Chu Mofei, Gongliangxiu casually flipped through the records, except for doubts or doubts. He casually said:

"It can't be the eyes that see the flowers, how can the sun emit blue light."

"Probably not." Chu Mofei affirmed, and then said: "For more than six months before the past, except for the rainy weather, it was visible every day. ”

Bai Liyan thought for a long time and asked Chu Mofei:

"That blue shimmer hasn't changed in months?"

"There should be no change, so I made a small dot with ink on the eyepiece and observed it for two months, but I never saw any change. Today's weather is fine, dusk is approaching, Hou Ye might as well take a look with his own eyes. ”

"Well, that's exactly what I mean. Get ready, I'll go see it right away. ”

"No!"

Bailiyan breathed a sigh of relief, and he thought in a blink of an eye, maybe it was another star blocked by the sun and in the distance of the deep space orbit behind the sun, which maintained the same orbital rate as the planet he was currently on, or it was slightly different, the two planets were on the same ecliptic plane at the same time, but another celestial body in different angles and spatial positions, and the faint blue light emitted by the refraction of the sun's rays.

However, it is too unlikely that there are two objects in the same solar system that maintain approximately the same rpm and are always moving at a uniform speed.

At this time, Gudapa and Mooney talked frequently, the accompanying priests whispered, and the royal guest in charge of monitoring was a little nervous, obviously climbing the mountain was not in the previous itinerary.

After waiting for another three quarters of an hour, the sun was setting, Chu Mofei cleared the idle people on the left and right, changed his sunglasses, and adjusted the telescope to the south by a few degrees.

In view of the size of the telescope and its large aperture, Bailiyan customized a set of gear guides and seats, which can be adjusted 47 degrees from left to right in the X direction, with a maximum elevation angle of 40 degrees and a minimum elevation angle of 6 degrees. There is a fixed viewing chair under the eyepiece that moves the same way with the telescope for easy observation.

The original intention of developing this set of gear guides was not only to install astronomical telescopes, but also to provide design experience for the construction of fortresses and the installation of giant fortress gun mounts.

The fortress cannon to be produced weighs 12,000 catties, about five and a half tons, and the theoretical limit range of smokeless gunpowder is 26 miles, and the fixed gun position will not be conducive to the deployment of the artillery, and it needs to rotate in all directions at 360 degrees, and a large gear ring guide rail is placed under the gun position to rotate the direction, so that all-round steering can be realized.

Without the accumulation of related projects, Bailiyan did not dare to start such a huge project rashly, in case of technical problems and abandonment, it is undoubtedly a huge waste.

Prior to this, it was obviously a good choice to use the observatory to put a small template for technical demonstration.

Sitting on the observation chair, through the eyepiece, I can see that the still dazzling sunset burns the eyeballs through the lens, and the resulting discomfort makes the vision whiter under the eyes. I continued to look around, but the sun was still white and dazzling, and I found nothing.

Unable to bear the dazzling scorching heat, Baili Yan broke away from the eyepiece and saw a white eye in front of her right eye, and she was a little dizzy. Chu Mofei stepped forward and hurriedly asked:

"Have you ever seen it?"

"Not yet."

"Maybe the hour has not yet come, and the sun is still scorching, and you should be able to see it before the mountain sets in a while."

"Then I'll take a look."

Wait a moment, adjust slightly, and look carefully again at the eyepiece. There were more than five minutes, and a faint blue halo flashed in front of him, like a blue halo of the sun's radiance, but only a little bit of blue emitted a faint blue.

"Hell, there's really one!"

Secretly said in his heart, shocked, held his breath and looked more carefully, ignoring the stinging pain in his eyes, enduring the discomfort, and observing for a long time, the blue halo was faintly stronger under the influence of the sun's westset, but it was not obvious, and there was no change in addition.

When he was removed from the eyepiece again, the fundus of his eye was illuminated by strong light, and his right eye was white and he burst into tears. Pulling out a handkerchief to cover his right eye, Bailiyan said:

"Master Chu, have you been observing the sun like this for half a year?"

"Exactly, if you stack sunglasses, you can't see it at all, but Hou Ye can see it?"

"Well, I see." Bai Liyan affirmed, left the wooden chair and continued to cover his right eye and said: "From today onwards, it is no longer possible to observe the sun with a naked glass, because it will be extremely harmful to human eyes in the long run." ”

"I see. That...... Does Master Hou know that the faint blue light is the reason? ”

"Yes, it should be another celestial body, which is the same as the previously discovered Tianbao Star and Tianshu Star, which are all celestial bodies of this solar system. It's just that this one is on the far side of the sun, and if it is expected, it will be roughly the same as the orbit of our planet, or only a very small error, and it will meet in different orbital planes after millions of years, and then continue to move in a different orbit

Now I only see a blue halo, which is the blue halo that the celestial body refracted after entering the back of the sun and being obscured by the sun, if it were tens of thousands of years later, it might not be visible. ”

After the establishment of the observatory, two other planetary objects in the solar system were discovered one after another, which were named Tianbao and Tianshu respectively.

It is almost certain that a blue halo from the far side of the Sun should be the third planet to be discovered in the system.

However, this object is in a special situation, its orbit is almost the same as that of the planet it is on, or there is a slight difference, but it is difficult to capture from the ground.

Bailiyan even suspected that the blue light emitted may be the result of a combination of the atmosphere and the refraction of water, and if so, blue may mean a planet that can be migrated.

Chu Mofei has been observing celestial bodies for more than ten years, and the latest internal celestial publications are also compiled by him, and he is extremely familiar with the theory of celestial galaxies. And Gongliangxiu seemed to be a confused traverser at this time, confused by what Bailiyan said. I saw that he was also covering his right eye, as if he was injured.

"Brother Gongliang also saw it?"

"Well, it seems to have a blue tinge, but what's the use. It cost so much money just to see a touch of blue glow on the side of the golden couch, which is really wasteful. ”

"Maybe, but at least the world has one more place to spy on the heavens."

"Huh...... You Yongxing Hou can take the moon for nine days, how can you come to heaven. By the way, after a day's journey today, I must spend the night in the mountains tonight, and you can't let me wait for the night to go hungry. ”

"Rest assured, the mountain is bitter cold at night, in order to drive away the cold and evil, this Miaotian Mountain has hot pot and live sheep all year round, and the food is very good. Tonight, I will enjoy the moon and eat wine here, and talk about the past. ”