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Chinese scientists plan to launch an artificial moon into orbit around Earth by 2020. The man-made satellite, called an "illuminated satellite", would have a reflective coating to cast sunlight back down to the city of Chengdu, China at night, supplementing streetlights and saving on electricity costs. While it would be brighter than the real moon, the artificial moon would still only be about one-fifth as bright as normal streetlights to the human eye. The plan faces further testing to ensure it is viable
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