NATS 1540 Lecture Notes - Lecture 6: Ancient Greek Astronomy, Heliacal Rising, Sirius

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Nats 1745 lecture 6 ancient greek astronomy. Other ancient peoples -> observed sky (sun, moon, planets, stars) Could make predictions based on observations -> no attempts at rational explanation. Heliacal rising of sothis predicted flooding of nile. Ancient greek astronomy: this changed with ancient greek"s. They constructed world new based on sense perceptions: greeks sought to develop geometric models of movement of planets. That could predict their observed positions at all times. There was a movement away from straight observations of nature, towards an artificial constructed: a model" that represented nature, underpinning of modern science. Predictions are made about nature by model ->> confirmed observer/measurement (or not) Hales of miletus (625-547bce: pre-socratic philosopher, 1st to explain natural phenomena without reference to mythology, using rational explanations, using unique physical causes for events in nature, thought water was the fundamental element. Anaximander: natures has impersonal laws (rather than g-ds revenge, thought universe was cyclical.

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