Five hours have passed. It was almost six o'clock in the afternoon, but the direction of the sun was always quiet. Neither satellites nor observatories nor radio telescopes received any logical signals from the direction of the sun.

Perhaps, it is really like the head of the observatory said, "either the K2-level civilization does not exist, or they ignore us." Now, five hours later, due to the angle difference caused by the rotation of the earth, even if the sun really transmits a signal, the Galaxy Radio Telescope cannot receive it.

Obviously, because it is built in a valley, the Galaxy radio telescope cannot rotate freely to align in different directions. It can only follow the earth and scan a certain range of the celestial sphere along a fixed orbit.

However, it doesn't matter if the Galaxy radio telescope cannot monitor the sun. At this moment, the radio telescopes built in other areas on the earth that can rotate freely are still chasing the sun until the sun sets.

The maximum intensity monitoring operation will last for three days. If no information is transmitted back after three days, monitoring of the direction of the sun will not stop. At least two large radio telescopes will still be responsible for this task.

"Then wait three days." Zhao Huasheng said: "Perhaps some people think it is easier to communicate with extraterrestrial civilizations to change the current dilemma than relying on our own power to change the sun, but I don't think so. I think if the sun changes because of its own physical mechanism, we still have some opportunities. If there is really a K2-level civilization, we don't have any chance. So... I hope there will never be a reply to the direction of the sun."

"Anyway, wait for these three days first." said the head of the observatory.

Zhao Huasheng, Li Wei, Meng Zhuo and others stayed in the Galaxy Observatory. After the Earth's rotation caused the Galaxy radio telescope to point in other directions and could no longer observe the sun, the Galaxy Observatory re-entered its daily work rhythm.

This is the most sensitive ear built by human civilization. It can even monitor the radiation emitted by distant river galaxies seven billion light years away. Since the construction of the Galaxy Radio Telescope, it has discovered at least 500 neutron stars and white dwarfs. Through gamma ray monitoring, it has identified at least 300 new celestial bodies that are suspected to be black holes. It has made many extremely important discoveries in close proximity to binary stars, Cepheid variable stars, supernova explosions, double neutron stars or white dwarf systems, as well as dense star-main sequence models.

There are huge amounts of radiation and signals in the universe all the time. The function of the Galaxy Radio Telescope is to monitor these signals, eliminate useless interference, and filter out signals that are valuable for astronomical research.

Zhao Huasheng is also an astronomer. Although his research direction is different from those of the Galaxy Observatory, this does not prevent Zhao Huasheng from participating. Zhao Huasheng stayed at the Galaxy Observatory for three days until noon on the third day.

Seventy-two hours passed, and the direction of the sun was still silent, still silent. No receiving device in the world received even a suspected signal.

At this moment, Zhao Huasheng received a notice from Wang Tang: "With the approval of the head of state, we decided to restart the solar detection plan. At least thirty detectors and a manned spacecraft will leave the earth and head for the sun."

"Very good." Zhao Huasheng said, "When will it be launched?"

"Tomorrow the astronauts will set off from Earth."

"Okay, I'll go and see them off."

"Welcome." Wang Tang said.

After the communication was cut off, Zhao Huasheng said to Meng Zhuo: "It's still some time before the rocket launch. Let's go to the Vulcan Sun Telescope to take a look. Maybe we can find some clues left by Director Li Qi there."

"Okay." Meng Zhuo agreed. After an hour of preparation, five helicopters carried Zhao Huasheng and his group away from the Galaxy Observatory and began to set off for the Vulcan Sun Telescope.

The Vulcan Sun Telescope is an optical telescope, so it must be built in a place with clean air to reduce the impact of the atmosphere on light. Only in this way can the observation accuracy be improved. In fact, the Vulcan Sun Telescope was built in a mountain range, with an altitude of more than 5,000 meters, and drought all year round and rainfall was sparse.

It is located at a low latitude. Although the solar radiation has decreased a lot, the temperature of the plain here is still above zero. However, it is different on the mountain. At an altitude of more than 5,000 meters, the temperature has dropped to about minus thirty degrees below zero. In such a severe cold, the helicopter that Zhao Huasheng was riding came to the open space in front of the Vulcan telescope.

The head of the Vulcan Telescope Base received Zhao Huasheng and his party. After receiving Zhao Huasheng from the cold outside to the base, he left alone and changed to another person to accompany Zhao Huasheng and others. This was a bit thin and dull middle-aged man wearing glasses. There was a pen in his pocket on his shirt, which looked very evident with the temperament of an intellectual in the last century.

"Yes, our telescope was indeed built by Director Li Qi," said the middle-aged man. "After Director Li Qi's unfortunate death, at least seven groups of people from the Research Department had come here to check, and none of them found anything valuable. Why, are you also from the Research Department? Come here to check on Director Li Qi's things?"

Zhao Huasheng nodded, "Yes, we hope to find some clues left by Director Li Qi here."

"No, nothing is there." The middle-aged man shook his head with regret. "Director Li Qi also has the authority to this telescope, but after the telescope was completed and put into use, he never paid attention to this place except receiving the observation data here. How could there be something left by Director Li Qi here?"

Zhao Huasheng asked: "Director Li Qi also has the authority to operate this telescope? So is it possible that this situation can happen? That is, Li Qi will not use you to operate this telescope directly with his own authority for certain observations?"

"In theory, this may exist." said the thin middle-aged man, "but the first seven groups of investigators from the scientific research department have investigated this matter, and they seem to have found nothing."

"Yes, the scientific research department staff investigated this matter," Meng Zhuo said, "The investigators did not find any traces left by Li Qi. There are two possibilities in this situation. First, Li Qi really did not do anything, and second, Li Qi did the operation, but they removed these traces very perfectly. We don't know which one is the specific possibility. Because this information is of no value, I did not report it to you."

"Yes." Zhao Huasheng nodded, thought for a while, and turned to Li Wei and asked: "Since it is an optical telescope, have you people from the Optical Institute participated in the construction of this telescope?"

"I participated," Li Wei said. "Investigators also investigated the construction drawings and technical parameters of the telescope, but found nothing strange."

"This is what..." Zhao Huasheng pondered for a while and said to the thin middle-aged man: "Can we go and see this telescope?"

"Of course." said the middle-aged man, "we can take a car over."

The group took a car to the huge factory where the telescope was located.

Optical telescopes are different from radio telescopes. They are not curved surfaces like pot lids, but in the traditional sense of the lens barrel structure, but they are much larger in size. When you want to use it, the baffle above the factory will be removed and the light from far away will enter its mirror.

Although it is also a mirror structure, it is different from other telescopes. Because other telescopes are mainly used to observe extremely distant celestial bodies, and they are used to observe the sun. The sun is too big and too close. If not processed, the sunlight gathered by the condenser is enough to melt the steel plate. Therefore, there are many filters outside the telescope, and the staff in the base can easily adjust the intensity of light entering the telescope by the observation needs.

Many staff members are busy here. On the huge screen in the factory, Zhao Huasheng also saw real-time images of the sun. It was a hot fireball with a dark red color. Even after being extinguished greatly, it still looked full of shocking power.

Due to the outbreak of the solar crisis, the observation mission of this telescope has suddenly increased a lot, and even the staff here are three or four times more than before.

Zhao Huasheng didn't say anything, but just wandered around the busy researchers, looking at the arrangement here, looking at the data sent back, and occasionally looking at the huge telescope mirror.

After a while, Zhao Huasheng asked thoughtfully: "How much accuracy can this telescope resolve sunlight?"

"Resolving accuracy? Do you mean?" asked the thin middle-aged man with some confusion.

"Light intensity. For example," said Zhao Huasheng. "If its accuracy is adjusted to the highest level, is it possible to discover a specific area of ​​the sun - this area may be very small. Just take ten square kilometers as an example. Can it discover the changes in the ten square kilometers of light intensity?"

"Of course you can find it." said the thin middle-aged man. "This telescope has a very powerful function. It is one of the most advanced ground telescopes built by us humans."

"What kind of accuracy can be achieved? Can a one-million-long photometric change be detected?" Zhao Huasheng asked immediately.

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Chapter completed!