AS101 Lecture Notes - Lecture 8: Circular Motion, Geocentric Model, Angular Diameter
Document Summary
Science is a systematic way to investigate the physical world. Observations: data from observing nature hypothesis (simplest idea that explains the data) implications (what does this predict) test the idea (controlled and reproducible experiment) scientific theory. If the outcome of the test supports our idea then it should be tested again by multiple independent researchers. F it weakens the hypothesis, then the hypothesis may need to be refined or discarded entirely. All scientific knowledge is provisional classical greek civilization. Sun, moon, and stars appear to revolve around us. Different stars are visible at different times of the year. Classical greek civilization believed in building and testing models to explain nature. What observational evidence supported this hypothesis (classical view of geometric perfection, circles) Heavenly bodies move on circular paths at constant speeds around the earth (each planet is on a different sphere) What observations might have motivated this hypothesis (circles again, and earth is a special place)
