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en-wikipedia-org-3066		Cleomedes - Wikipedia			.html	text/html	1630	317	52	Cleomedes (Greek: Κλεομήδης) was a Greek astronomer who is known chiefly for his book On the Circular Motions of the Celestial Bodies (Κυκλικὴ θεωρία μετεώρων), also known as The Heavens (Latin: Caelestia). The earlier estimates rely on the fact that Cleomedes refers extensively in his writing to the work of mathematician and astronomer Posidonius of Rhodes (c. These conclusions have been challenged on the grounds that Cleomedes' work was in relatively elementary astronomy, and that reference to Ptolemy would not necessarily be expected. On the Circular Motions of the Celestial Bodies[edit] Many modern mathematicians and astronomers believe the description to be reasonable (and believe Eratosthenes' achievement to be one of the more impressive accomplishments of ancient astronomy). Euclid's theorem Apollonius's theorem Ptolemy's theorem Wikipedia articles with ISNI identifiers Wikipedia articles with VIAF identifiers Wikipedia articles with CINII identifiers Wikipedia articles with RERO identifiers Wikipedia articles with SUDOC identifiers	./cache/en-wikipedia-org-3066.html	./txt/en-wikipedia-org-3066.txt