Section 1 - Science and the Universe - A Brief Tour.docx -...

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Section 1: Science and the Universe: A Brief TourWhy Astronomy? We will go over astronomy:• Historically: Ancient Motivations• Modern AstronomyExample: Milky Wayhistorical/modern perspectiveSeen as band across the sky with a density of stars so high, that it blends and looks“milky”Very important throughout time, many cultures and periods in time, used as stories, myths to explain whatit is and its significance.Known as Silver River in East Asia, Straw Way Central Asia, Via Lactea in Roman, Galaxia Kyklous inGreekin roman and Greek means Milk.Now know it is a disk-shaped object called a galaxy. Hundreds of billion stars, our sun very average onepart of it.Ancient Astronomy(see Chapter 2)• Navigation – before compasses, • Seasons – before calendars, • Cultural/Religious Festivals before Christmas –Winter Solstice – one of shortest day of yearModern Astronomy• Beauty of Nature: Seeing and understanding• Toughest playground for Physics available (highest and lowest Temperatures, densities, … ). (own) Since physicscan applied anywhere, it is a great way to test our current knowledge and to possibly to discover more better theoriesand ideologies of the way things work in our universe.• Origins of Life, the Universe and Everything – goal of astrobiologists, to find clues of origin of life from molecularclouds, which condensed from the enriched gases of stellar explosionsCourse Goals

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Term
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