I call this mirrorball a Monomyth (after J. Campbell) because it represents the model of heroe's journey, also called monomyth, which is usually depicted as 2D circle. I wanted the monomyth to have more space and air so I decided it should be 3D and look like the Moon, illuminated by the sun.
A Photo of Monomyth. 1m x 1m mirrorball with the motor and a lamp.
Video of Monomyth moving and illuminating the gallery