Long description

This figure contains two rectangles. The one at the top is labelled ‘orrery’. The one at the bottom is labelled ‘solar system’. An arrow labelled ‘represented/modelled by’ goes up from the ‘solar system’ rectangle to the ‘orrery’ rectangle. Another arrow, labelled ‘ignores detail of’, goes down from the ‘orrery’ rectangle to the ‘solar system’ rectangle.