Lecture12008

Lecture12008 - Physics 5 The Universe The Story of...

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Unformatted text preview: Physics 5 The Universe The Story of Astronomy Frank H. Shu UCSD Fall 2008 Course Organization Lectures: MWF 1:00-1:50 WLH 2005 Discussions: W 5:00-5:50 CENTR 109 Office hours: 10:00-10:50 morning before lectures Text: Pasachoff & Filippenko, The Cosmos: Astronomy in the New Millennium, 3rd Ed. Grading: Best 3 of 4 quizzes: 30% (10% per quiz) Three Term projects: 45% (15% per project) Outline of important points: 15% (1.5% per week) Discussion participation: 10% (1% per week) Course Approach History with emphasis on story Each lecture is a story Complete course is subtitled The Story of Astronomy Story of science, how we came to know what we know Story of the physical universe, how it came to be what it is Story of ourselves, the origin and place of humans in the grand scheme of all things Outline of Lecture How astronomy is used for navigation How astronomy is used as calendar to forecast seasons throughout the world Astronomy is therefore deeply embedded in human culture: Science Religion Art Music Literature Code = Lecture 1 The Birth of Science Astronomy: astron (Greek for star) + nomos (Greek for word or law) Astronomical lore deeply embedded in human culture Science (Greek for to know) Religion (Astrology: aston [star] + logos [reason]) Relationship to art & literature in search for order, truth, & beauty Scope of modern astronomy extends beyond stars Big bang to black holes Quarks to quasars Interstellar dust to extrasolar planets First light in universe to first lifeforms on earth Out of Africa ( Jared Diamond: Guns, Germs, & Steel) Separation of human primate branch about 7 million years ago in Africa. Spread to Middle and Far East about 1 million years ago, to Europe about 0.5 million years ago. Early societies: nomadic people, who survived by hunting and gathering First religions revolved about worship of animals. But nomads must be able to tell directions, especially at night, or out on the open sea. Reliable guidepost = fixed pattern of night stars except for daily (diurnal) rotation. Example: Big Dipper and the direction North. Prehistoric painting in the cave of Lascaux, France. Time Lapse Photograph of North Celestial Polar Region Apparent spin of sky actually due to spin of Earth (Aryabbhata, 476-550) Relationship to Latitude N To Polaris !...
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Lecture12008 - Physics 5 The Universe The Story of...

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