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'''Physics 3133 Chapters 1 and 2 "[I]t is once for all clear ... that the earth is in the middle of the world and all weights move towards it." - Ptolemy, The Almagest, 2nd century A.D.

Chapter Objectives

Define the ISU for length, time, and mass. Describe the nomenclature used in the ISU. List and describe three reasons why we should study astronomy.

Define the following terms and understand how they are used to find celestial objects: Longitude Latitude Altitude Azimuth Horizon Zenith Meridian Celestial equator Celestial pole Ecliptic Constellations Sidereal year/sidereal month Zodiac Celestial Coordinates

Describe the elements that comprise the modern scientific method. Differentiate between astrology and astronomy.

Homework Problems:

Physics 3133 Chapters 1 and 2 "[I]t is once for all clear ... that the earth is in the middle of the world and all weights move towards it." - Ptolemy, The Almagest, 2nd century A.D.

Chapter Discussion Questions

What does the term "geocentric universe" mean? Why did ancient cultures think it was true? What is a circumpolar star? What would be the circumpolar stars at the North Pole? At the equator? What proof do you have that the Earth is not flat? Oh, Yeah If you were told that a star was on the meridian, where would you look? If you were told that it was at the zenith, where would you look?

Why are the zodiacal constellations important?

Why is the altitude-azimuth system for describing an object's position not a good system to use over a period of time? Is astrology a crock?

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