The (Ptolemaic) geocentric and (Copernican) heliocentric theories offer different arguments on the relationship between the earth and space. While the legitimacy of the heliocentric theory is generally being acknowledged according to scientific knowledge, it is difficult to gather enough subjective evidence to verify it.
This work is based around an interface modeled after the relationship between the sun and the earth, which can be used to change the earth's (model's) rotation, revolution, and additionally, the axis of its revolution. Such operations trigger dynamically transforming visual projections of the sky and space onto the floor surface. In this process, the visitor can experience the motional changes of celestial bodies that appear when switching between the geocentric and the heliocentric system.