AS101 Lecture Notes - Lecture 7: Angular Diameter, Circular Motion, Sagan Standard
Document Summary
Science is a systematic way to investigate the physical world. If the outcome of the test : supports the hypothesis, then it should be tested again by multiple independent researchers, weakens the hypothesis, then the hypothesis may need to be refined or discarded entirely. In order for an idea to become accepted as a scientific theory it must: be tested repeatedly by multiple groups, and not shown to be false, a scientific theory is much stronger than a hypothesis. All scientific knowledge is provisional: but extraordinary claims require extraordinary evidence (carl sagan) Ancient peoples observed that: the 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. Lunar eclipse: earth cast a circular shadow on the moon. Ships sinking into the horizon: not only did this idea agree with the observations, but it also fit with the classical.
