[German version]

A. Extent, definition and term

Astronomy is the description, causal justification and forecast of celestial phenomena, the latter on the basis of repeatable and repeated observations or calculations based on these -- and periods derived from them. In Greece astronomy originally comprised all the μετέωρα (metéōra, celestial bodies; Thales fr. A 2; Gorgias fr. B 11, 13 DK), at the latest since Aristotle the metéōra conceived as sublunary were largely excluded. Besides, …