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DateDate: 20-10-2018, 06:30

The city of Chengdu in southwest China may abandon street lamps in favor of an artificial satellite in Earth orbit.
How it works?
The new light source will complement the moon in the night sky and will be eight times brighter than a natural satellite. He will be able to cover the area with a diameter of 10 to 80 kilometers, and the range can be adjusted to an accuracy of tens of meters. The development of the Chinese Aerospace Science and Technology Corporation (CASC) has been tested for several years. The launch of the device will take place at the Sichan Cosmodrome approximately in 2020.
A huge mirror reflecting sunlight will be installed on the satellite. The idea itself is not new - in the framework of the experiment “Banner 2” in 1992, Russian scientists launched a 20-meter solar sail in space. He created an 8-kilometer bright spot swept over Europe at a speed of 8 kilometers per second. Alas, after the unsuccessful launch of the second unit in 1999, funding for the project ceased.
In order for the “artificial moon” to be constantly above the city, CASC will have to find a geosynchronous orbit.
How profitable is it?
According to preliminary estimates, the innovative system will save up to $ 170,000 per year in street lighting. But given the cost of launching rockets (from tens to hundreds of millions of dollars), this will be more likely a demonstration of the achievements of China’s space program than an economically viable solution.