Artificial moon, the sharp weapon of lighting or the source of pollution?

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 Artificial moon, the sharp weapon of lighting or the source of pollution?


Newspaper reporter Zhang Gailun

Scientific spirit

In 2020, when you look up at the moon, you may also see a brighter star.

The so-called artificial moon is an artificial lighting satellite that carries large space mirrors. Wu Chunfeng, chairman of the company, previously introduced that the artificial moon can use sunlight to provide lighting for the city, and its maximum intensity of illumination can reach eight times the moonlight.

On the 31st, Pang Zhihao, an aerospace expert, told the Science and Technology Daily that it is not necessary for China to launch the artificial moon, but it is meaningful to master the relevant technology. Ren Xiaodong, director of the Star Work Committee of the China Foundation for Biodiversity Conservation and Green Development, believes that the artificial moon may cause serious light pollution, and the project should be carried out with caution.

Russia has tried, the technology is more difficult.

Wu Chun Feng has previously said that the artificial moon is expected to be deployed in the low earth orbit within 500 kilometers. In order to achieve 24-hour lighting, the project will launch three artificial moons by 2022, equal 360 degrees of orbital plane, alternately running.

That is to say, the reflective mirror carried by this satellite should take into account the area, weight and reflective performance; working in space, the mirror should be strong enough, the mechanical structure should be stable enough... I personally think its very difficult to launch such a big thing into such a high orbit and make sure it doesnt lose its chain for a long time. Gou Lijun, a researcher at the National Astronomical Observatory of the Chinese Academy of Sciences, said.

For our country, the necessity of making artificial moon is not strong. Pang Zhihao pointed out that despite this, it is still meaningful to study this technology. At present, people are also wondering whether it is possible to place solar reflectors in lunar orbit so that lunar probes can be less affected by long moon nights; also consider placing reflectors in Mars orbit to heat Mars and transform Mars to be livable. Therefore, the artificial moon technology can still play a role in other areas of space exploration.

The controversy over the artificial moon has always been there. The man-made moon is controlled by humans, who can adjust its exposure time, area and brightness as needed. Pang Zhihao said that new technology always has advantages and disadvantages, and the key is how to foster strengths and circumvent weaknesses. Artificial moon is a new attempt not only to benefit mankind but also to protect natural resources. He said.

Astronomers also have headaches, or bring light pollution.

If it is to save energy, the fundamental solution is to optimize the existing urban energy utilization mode scientifically and rationally, rather than launching several satellites to reflect the light. Unlike Pang Zhihaos optimism, when he saw the news, Ren Xiaodong told the Science and Technology Daily that he had to leave the night behind.

Ren Xiaodong said that if there are more than one moon in the sky, the first thing affected is the nocturnal life. All life on Earth depends on the regular alternation of day and night, a characteristic found in the genetic sequences of all plants and animals. The increasingly serious light pollution itself interferes with the environment and ecosystem at night. Ren Xiaodong introduced that insects, for example, reproduction, foraging behavior are directly related to the intensity of light, light pollution will change the living habits of organisms, foraging places and growth cycle.

Wu Chunfeng believes that there is no need to worry about light pollution, because the human eyes feel theartificial moonillumination is only about one-fifth of the real-life street lighting. This statement also makes Ren Xiaodong puzzled: if the intensity of light is not high, then what is the meaning of an artificial moon? If the intensity of illumination is high, it is bound to cause light pollution.

Gou Lijun also bluntly said that for astronomy, this is not good news. Astronomical observation requires a completely black environment. We generally classify weather conditions into three categories, darknight, greynight and brightnight, based on the presence or absence of the moon. Gou Li Jun said, artificial moon brings light pollution, which affects astronomical observation.

So we dont quite understand what the meaning of this project is. Ren Xiaodong believes that if the company really wants to launch the artificial moon, the company should find relevant authorities as the leading unit, including aerospace, astronomical observation, energy technology, ecological environment, medical health and other fields of experts, scholars and organizations to jointly demonstrate the necessity and rationality of the artificial moon.

The reporter contacted the companys location in Chengdu Tianfu New Area, the area staff said that the launch of the artificial moon for the companys conduct. Wu Chunfeng replied to ScienceDaily daily that the company is currently working on the design of the reflectors deployment mechanism. The matter is being tackled, and then the report is a commercial speculation, contrary to the original intention. He declined the request for further interviews.

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Comment

The implementation of science and technology power and innovation driven development strategy should be based on responsible research and innovation. The essence of responsible research and innovation lies in carrying out innovation with a scientific spirit and a realistic attitude, examining the consequences of innovation and constantly correcting the direction of innovation. In the application of science and technology, if the tremendous power of science and technology can not be used carefully and properly, it will inevitably cause a lot of irreversible effects, not only waste human and material resources, but also make the public misunderstanding of scientific and technological innovation, and affect the attitude of social support for innovation. Artificial moon such a project, affecting a wide range, not just a kind of corporate behavior. The enterprises concerned and the competent authorities should carefully examine and weigh the positive and negative consequences, conduct a systematic and in-depth assessment, and accept questions from representatives of relevant interest groups, including the general public. (Professor Duan Weiwen, Director of the Research Center of Science and Technology and Society, Chinese Academy of Social Sciences) (Xinhua, Beijing, Oct. 31, Science and Technology Daily) This article is originated from: Science and Technology Daily - Responsible Editor of China Science and Technology Network: Qiao Junjing_NBJ11279

The implementation of science and technology power and innovation driven development strategy should be based on responsible research and innovation. The essence of responsible research and innovation lies in carrying out innovation with a scientific spirit and a realistic attitude, examining the consequences of innovation and constantly correcting the direction of innovation. In the application of science and technology, if the tremendous power of science and technology can not be used carefully and properly, it will inevitably cause a lot of irreversible effects, not only waste human and material resources, but also make the public misunderstanding of scientific and technological innovation, and affect the attitude of social support for innovation. Artificial moon such a project, affecting a wide range, not just a kind of corporate behavior. The enterprises concerned and the competent authorities should carefully examine and weigh the positive and negative consequences, conduct a systematic and in-depth assessment, and accept questions from representatives of relevant interest groups, including the general public.

(Duan Weiwen, director of the center for science, technology and social research, Chinese Academy of Social Sciences)

(our correspondent Cao Xiuying contributed to this article).

(Science and technology daily, Beijing, October 31)