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FAST is surrounded by a five-kilometre “radio silence” zone where mobile phones and computers are not allowed.
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began in 2011. It cost 1.1 billion yuan to build. FAST boasts of a 500-metre giant satellite dish, the size of which can cover the area of 30 football pitches. This is also the world's largest. <span>FAST is surrounded by a five-kilometre “radio silence” zone where mobile phones and computers are not allowed. Thousands of villagers were displaced to make room for this telescope. FAST mainly captures radio signals emitted by celestial bodies. In particular, pulsars which are rapidly rotating


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