World Financial Center, Battery Park City, New York, New York. 1990
Intended to suggest the view of the Earth or another planet from space, the sculpture consists a large, rotatable, spherical glass vessel, filled with a deep-blue fluid that reveals the movements of the currents within. Viewers are encouraged to rotate the spherical vessel by turning a cast iron wheel attached to the base. As the vessel spins, the fluid displays intricate flow patterns suggestive of a stormy atmosphere. Swirls of fluid, resembling hurricanes, appear and dissolve as the Orb slowly rotates. Even when the sculpture is left undisturbed, the fluid continues to flow for many hours.