The formation of an expeditionary space fleet by the Earth Star Kingdom is to deal with the Dyson Sphere plan of the Heavenly Court. In order to find out the progress of the Dyson sphere, Wei Xinyu decided to visit the Zhenbei Observatory of the Earth Star Country Observatory.

Wei Xinyu got off the plane, got on the special car of the Zhenbei Observatory, drove for about 30 minutes, on the Gobi Desert, 35 kilometers east of Zhenbei City at an altitude of 4,000 meters, a huge white ball towered between the bare mountains, wrapped in a solar radio telescope, day and night to patrol the bright galaxy, and use a computer to depict the observation of the sun.

Wei Xinyu walked into the office of the True North Observatory, and a tall thin man received him:

"My name is Wang Lin, and I am the stationmaster of the Zhenbei Observatory, and yesterday I received a call from the Ministry of Defense of the Earth Star Country, saying that you are going to learn about the data of observing the sun at our observatory today. I asked our observers overnight to sort out the data, and we have entered all the observation data of the sun in recent years into a USB flash drive, so that you can bring it back for study. ”

Saying that, Stationmaster Wang Lin handed over a USB flash drive to Wei Xinyu.

Wei Xinyu put the USB flash drive into his briefcase and asked, "In the past few years, have you found anything unusual in your observation of the sun?" ”

Wang Lin put his hand on his glasses and said, "Recently, we have found that a large number of covers have appeared between the earth and the sun, causing a significant decrease in brightness. However, after analyzing this matter, we believed that it was only the dust belt around the sun that blocked the sun, and it was not the "Dyson sphere" of alien super civilization. ”

Wei Xinyu asked in a skeptical tone, "Are you sure?" ”

Wang Lin thought for a while and said: "I can't be completely sure, although our Zhenbei Observatory is the first radio telescope in the Earth Star Country, it observes the sun through the radio waves emitted by the sun, and it can not be limited by optical telescopes, and can see some solar physical phenomena that cannot be seen with optical telescopes in the past, so that we can grasp the law of changes in solar radiation energy and the impact of these changes on the earth, but because the diameter of our telescope is only 50 meters, the ability to receive weak signals is relatively weak, and the resolution is not high. Therefore, it cannot be completely denied that the significant decrease in the brightness of the sun is not caused by the "Dyson sphere" of the alien super civilization. ”

Wei Xinyu frowned and did not speak. Wang Lin went on to say:

"You can go to the True West Aomine Observatory, which is currently the largest rotating radio telescope in the Earth Star Country. With an aperture of 500 meters, a receiving area the size of 30 football fields, and a shape similar to a satellite dish, the radio telescope is 20 times more sensitive than the 50-meter telescope at our True North Observatory. The larger the telescope, the stronger the electromagnetic waves it collects, and you may be able to find the answers you need when you go there to get information about the sun. ”

So, Wei Xinyu said goodbye to Wang Lin, and hurriedly rushed to the Zhenbei City Airport in the special car of the North Observatory.

Due to the long distance to the Shinsai Aomine Observatory, getting off the plane from Aomine City Airport requires a day's long bus ride, and there is only one bus per day. At this time, it was already past 9 o'clock in the evening, and there was no long-distance bus to the Aomine Observatory. Wei Xinyu could only stay in Ethereal City for one night, and he took a long-distance bus to the Qingfeng Observatory early the next morning.

The Shinsai Aomine Observatory is located in a natural depression called Owotai in the depths of the Aomine Mountains, and its topography resembles that of a giant sinkhole. The three green hills in Tai Wo Tai are isosceles triangles, and the depression in the middle of the triangle is where the FAST 'cauldron' lands. The distance between each of the three peaks is about 500 meters, forming a natural 'pot rack', on which the 'cauldron' of FAST is firmly shelved, filling the entire valley. In order to maintain the unique electromagnetic wave environment, the Astronomical Administration of the Earth Star Country, at the beginning of the FAST project, planned a radio astronomy reserve with a radius of 150 kilometers with Dawotai as the center, and it is strictly forbidden to set up any radio transmission equipment within a radius of 5 kilometers with Dawotai as the center.

At 8 o'clock in the evening of the same day, after getting off the bus in Qingfeng Town, Wei Xinyu relied on the abundant energy in his body to walk on the rugged mountain road for less than an hour and came to Dawotai. There are only about a dozen households in this big nest, and it is located deep in the mountains.

Sitting on the sofa in the office of the director of the Shinsai Aomine Observatory, Director Gao Rui received him.

Gao Ruitai is not tall, very stocky, bronzed skin, square face, thick eyebrows and big eyes, full of anger when he speaks, he asked Wei Xinyu that he had eaten lunch, made him a cup of tea, and then sat beside him, took out a pack of cigarettes from his pocket, after Wei Xinyu waved his hand and refused not to smoke, he lit a cigarette alone, took a puff of cigarette, spit out the smoke ring, and asked:

"I received a call from Stationmaster Wang Lin, you came to our observatory to look for clues to alien Dyson spheres, right?"

"Hmm." Wei Xinyu nodded unabashedly and replied.

Director Gao Rui took another puff of his cigarette and said:

"FAST is both a radio observation center and a giant data processing center, and all the observed data is filtered repeatedly with various algorithms. Through the calculus of observational data, I judged that the sun was being wrapped by aliens, which was the work of alien Dyson spheres. First of all, we found that there were two large drops in the sun's light curve, one at around day 190, which dimmed by 15%, and around day 320, when the light curve dropped by 22%. The second descent was followed by a number of smaller descents, and I'll give you an example: a planet the size of Jupiter, in the right position, can only reduce the brightness of the Sun by a maximum of 1%, an anomaly that intrigues us. ”

Director Gao Rui opened the screen on the wall in front of the sofa, called up the relevant information, and continued:

As shown in the figure, the vertical axis represents the brightness of the star (the brightness in the "normal" case is 1), the horizontal axis is time, and the unit is days. Can not see clearly? Zoom in on the longitudinal axis: Intercept two of the larger drops: I analyzed the possibility of instrument error and concluded that the observation error could not explain this phenomenon, so it was necessary to consider the possible physical mechanism behind it. Usually the first thing to consider is a large cloud of dust or dust disk around the sun, such as the famous ε Aur in the constellation Auriga. If the sun's brightness drops due to dust occlusion, the star must be slightly brighter than normal in the infrared band due to the low temperature of the dust particles, a phenomenon called "infrared hyperpower", which is usually used to check for the presence of dust disks around the star. However, there is no infrared ultrasound in the object blocked in front of the sun, which is a bit strange. Therefore, I think that from the perspective of civilization development, it is possible for a civilization that is thousands of years more advanced than terrestrial humans to build a Dyson sphere for energy purposes, and I judge that someone is building a Dyson sphere, and now this object has blocked some of our sunlight. I don't know if you agree with me. ”

Wei Xinyu nodded in approval and said, "Your analysis is correct." ”

Director Gao Rui said, "If this is true, it is terrible. I have consulted some information about the Dyson sphere, and some scientists believe that the Dyson sphere is to surround a star and continuously absorb the energy of the star for their own use, which can only be achieved if the speed of human civilization development reaches the second level of civilization. If you can make a Dyson ball, then it means that this civilization is already very powerful. The development of a civilization is inseparable from energy, the use of the energy of the home planet is only the initial stage, and it is also a civilization below the first level, at present, the earth planet has not yet reached the first level of civilization, from the first level to the second level of civilization we need about 10,000 years, so the earth planet human beings have the ability to build a Dyson sphere It will take 10,000 years. Sooner or later, the energy on the planet will run out, so in the end, it is necessary to go to the starry sky and the universe to extract energy from space, and the most important thing in the universe is the stars. ”

Wei Xinyu corrected and said: "You are wrong, it is this Dyson sphere plan, how many stars have they dismantled, what they lack is to be able to demolish the stars, and now it has endangered the planet." We are now about to put a stop to this crazy Dyson ball plan. ”

Director Gao Rui exclaimed: "They are crazy, you are even more crazy, just imagine what the human beings of an earth planet that is one level behind the civilization of others will fight with others?" You're only insulted, so we might as well work with them to build a Dyson sphere. ”

Wei Xinyu took a sip of tea and said: "This is your wishful thinking, the other party's construction of the Dyson Sphere is not only to solve their energy problem, they want to kill two birds with one stone, and want to use the Dyson Sphere to destroy the human beings on the Earth Planet in one fell swoop." ”

Director Gao Rui scolded: "This plan is too vicious. Couldn't a higher civilization develop together with a lower civilization? I have always thought that as long as human beings enter the high-level intelligent creatures after entering the second-level civilization, they will never be like our current human beings and follow the laws of the forest, I really didn't expect that they would do something harmful like Dyson Sphere that destroys humans and creatures in the solar system. ”

Wei Xinyu told Director Gao Rui: "What they pursue is the law of the dark forest, and they want to destroy the human civilization on the planet again by building the Dyson sphere, which is the result of the struggle between the two factions of the Heavenly Court." ”

Gao Rui sighed: "Hey, the universe is like a dark forest, for a certain advanced civilization, other civilizations are an eternal threat, and the best way is to destroy the main star they rely on for their livelihood, no wonder, in the past few years, the human disasters on the earth planet have been continuous, all thanks to them." ”

Wei Xinyu said: "So we have to fight, although we are weak, we are not afraid, at least we can make them fearful." ”

……

The two talked and talked, and unconsciously late at night, Wei Xinyu did not continue to talk in order not to affect the rest of Director Gao Rui. Director Gao Rui copied all the evidence about the Dyson sphere detected by FAST into a USB flash drive and handed it to Wei Xinyu, and then asked his assistant to arrange Wei Xinyu to stay at the Qingfeng Observatory Guest House.

The next day, Wei Xinyu said goodbye to Director Gao Rui, got on a long-distance bus, and then took planes and other means of transportation, and finally returned to Mantes City. Wei Xinyu, who had waited for a few days, finally met Chairman Wang Shouren who had returned from an inspection in the office of the Chairman of the Earth Star Kingdom Alliance Building, and he reported to Chairman Wang Shouren that the construction of the Heavenly Dyson Sphere detected by the True West Qingfeng Observatory had indeed entered the final stage, and submitted his report on the discovery of the construction of the Heavenly Dyson Sphere, and preliminarily put forward his battle plan for the Heavenly Dyson Sphere Plan, in which he believed that due to the great disparity between the strength of the Earth Star Kingdom and the Heavenly Court, he could not attack it, but could only outwit it. First, send micro-robots to investigate, and after finding out the details of the opponent, find the weak link of the heavenly court, and then send troops to attack from their weak points, take a surprise attack, and strive to destroy the Dyson ball with one blow, and a detailed battle plan is in the pipeline.

Chairman Wang Shouren felt that time was pressing, and the Earth Star Country must act quickly, and the Space Force of the Earth Star Country, after receiving the order, sent a large number of miniature robots to fly into space for a while.