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Recently, A 10-year-old boy in Guangdong Province, China, has built his own telescope using materials around him. The total cost was only 28 yuan (about $4), and the telescope can clearly reveal craters on the Moon!
Recently, A 10-year-old boy in Guangdong Province, China, has built his own telescope using materials around him. The total cost was only 28 yuan (about $4), and the telescope can clearly reveal craters on the Moon!