Spherical lighting elements of various sizes are being suspended into the skyline above the streets of the centre of Uster. At six different locations, these luminaires form known constellations, which can actually be observed in the December sky above Uster. The luminaires consist of a spherical frame, which is hung with highly reflective aluminium plates. The light emitted in all directions from the centrally positioned light source via a prism glass makes the metal plates glitter. Sound elements brought to sound by the wind turn the constellation USTER into a synesthetic overall experience for locals and visitors.