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Astronomy Introduction • Astronomy is the study of… • the heavens and • the Earth’s place in the heavens. What is astrology? • Astrology is the belief that events in the heavens affect the lives of individuals on Earth. • What an appropriate title for the book on the right! What’s the difference? • For many years there was none, but to put it simply: • The difference between astronomy and astrology is the same as the difference between a telescope and a horoscope. • Astronomy is science, astrology is not. The Scientific Method • Step One: is to observe a natural phenomenon and form a question. • Step Two: is to hypothesize an answer. • Step Three: is to make further observations and/or experiment to test the hypothesis. • Step Four: is to revise your hypothesis if necessary and repeat step three! In summary… • • • • Observe and Question Hypothesize (Educated Guess) Observe/Test Revise and Repeat • Note: Hypotheses are not thoroughly tested, Theories are well tested and are accepted by the scientific community. Hypothesis and Theory • In our everyday language (the vernacular) those words are interchanged without much thought. • In science however, we must be careful. • Can you think of some ideas that are called theories and hypotheses? How about Laws or Principles? • Discuss… Next: The Scale of the Cosmos