Goddard Multimedia Animation Number: 10910. Archived from the original (OGV) on 3 February 2012. Retrieved 6 February 2014. ↑ Aristotle On the Heavens, Book II 298 B ↑ Cleomedes 1.10 ↑ Strabo 2.2.2, 2.5.24; D.Rawlins, Contributions ↑ D.Rawlins (2007).