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Sunsphere
The Sunsphere, in Knoxville, Tennessee, is an high hexagonal steel truss structure, topped with a gold-colored glass sphere that served as the symbol of the 1982 World's Fair.
==Design==
Designed by the Knoxville architectural firm Community Tectonics, the Sunsphere was created as the theme structure for the 1982 World's Fair. It was noted for its unique design in several engineering publications.
The World's Fair site later became a public park alongside Knoxville's official convention center and adjacent to the University of Tennessee's main campus. The Sunsphere remains standing directly across a man-made pond from a vacant outdoor stage.
In its original design, the sphere portion was to have had a diameter of to represent symbolically the diameter sun.〔 The tower's window glass panels are layered in 24-karat gold dust and cut to seven different shapes. It weighs 600 tons and features six double steel truss columns in supporting the seven-story sphere.〔 The tower has a volume of and a surface of .〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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