[Giant sphere structure of Dyson ball]
Dyson sphere is a giant sphere structure that completely surrounds the sun (or any other star) to use its energy. For humans, building a Dyson sphere will be a technological leap. Dyson sphere can help us transform from a planetary species. It is an interstellar species. Researchers have suggested that if something like Dyson sphere is built around a black hole, will it also get a lot of energy? The answer is yes.
In a black hole the size of a star or a supermassive black hole, nothing can escape, even light is no exception. However, scientists have assumed some of the most extreme conditions in the universe and discovered that extremely energetic processes occur around the black hole. A paper published in the Monthly Bulletin of the Royal Astronomical Society believes that these processes will prove that the Dyson sphere theory is correct.
[Place a Dyson sphere around the black hole]
A research team led by Xiao Yuyang, an astronomer at Tsinghua University in my country, observed the possible radiation emitted by the accretion disk around the black hole, its corona, and even the relativistic jets emitted by the black hole.
The result data show that all these phenomena are extremely active. If any advanced civilization can control them, then the civilization certainly does not have to worry about lack of energy. In this paper, Kardashov’s civilization index is used. The index was originally a concept proposed by Soviet astronomer Nikolai Kardashov. He believed that civilization in the universe can be divided into three levels: Type I Civilization can use all the energy on the parent star, type II civilization can collect the energy of the entire star system, for us it is to completely control the output of the sun, and type III civilization can use the energy of the entire galaxy.
The theory explains that the Kardashov type II civilization can use about one trillion times the energy used by all humans in 2020. With this in mind, placing a Dyson sphere around the black hole is the most effective solution.
[Alien civilization can do it]
Xiao Yuyang told IFLScience: “Usually, accretion disks can provide 10,000 times or more energy, which you can get from stars like the sun, so we don’t need to look for 10,000 stars like the sun, but only need to find a black hole. , And build a Dyson sphere around it, so the efficiency will be much higher.”
By their very nature, black holes are very unbelievable, and even if we capture a small part of them, our civilization will last for billions of years.
As humans at this stage, we may not be able to do it, but maybe an alien civilization can do it, and if such a structure exists in the galaxy, we can definitely detect it.
Image source: iflscience
資料來源：Dr Alfredo Carpineti(2021AUG 18).Dyson Spheres Around Black Holes Could Be A Phenomenal Power Source For Alien Civilizations. Iflscience
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