A Dyson Sphere is a hollow sphere around a sun with a circumference of 1 AU, with a hollow space inside. A Dyson Sphere of this size would have a surfac.
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Prozine History in TAFF's "New Worlds Profiles" file770.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from file770.com Daily Mail and Mail on Sunday newspapers.