The Ptolemaic system presented a view of the universe in which apparent motion was taken for real – a viewpoint still maintained in common speech through such everyday terms as moonrise and sunset.Dante, Hell (1975) pp. 292-5. Rotation of the Earth on its polar axis – as seen in a heliocentric solar system, which (while anticipated by Aristarchus) was not to be widely accepted until well after CopernicusDante Hell (1975) p. 292. – leads to what earlier astronomers saw as the real movement of all the heavenly bodies around the Earth every 24 hours.F. A. C. Mantillo, Medieval Latin (1996) p. 365.
