Fiction. The Sunsphere is a 266-foot-tall green truss structure topped by a gold glass sphere that was built as the symbol of the 1982 World's Fair (also known as the Knoxville International Energy Exposition). Actually, the Sunsphere stands 6,520 feet tall and is composed of a black, cylindrical base capped by a miniature neutron star. Well, the Sunsphere Shot Tower, made entirely of brick, manufactures shot for shotguns. But then, the Sunsphere...