Lecture23 - there wondering, fearing. (E.A. Poe, The Raven...

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1 The History and Philosophy of Astronomy (Lecture 23: Epilogue) Instructor: Volker Bromm The University of Texas at Austin Department of Astronomy Signature Course UGS 303 (Fall 2009) Our Cosmic Vantage Point Earth: - 10,000 km - 4.5 billion years - Humans: 1 million yrs From Home to Immensity: Journey through Space An in±nite universe, no center, no edge! Universe on the Grandest Scale: Observed The Hubble Deep Field: few 1000 galaxies
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2 The Dark Side of the Universe • Big Q: What is the universe made of? • consensus view of early 21 st century (WMAP): - 4% normal matter (`baryons ʼ ) (stars, gas, people…) - 23% dark matter - 73% dark energy ``Deep into the darkness peering, long I stand
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Unformatted text preview: there wondering, fearing. (E.A. Poe, The Raven ) We don t know what > 90% of universe is made of !!! Universe on the Grandest Scale: in the computer 2.4 billion lightyears Millennium (Supercomputer-) Simulation (Springel et al. 2005) The expansion of the Universe is accelerating! Dark energy drives the cosmic acceleration! 14 Cosmic Calendar: Human History in Perspective 3 History of Astronomy: The Story of Humanity Auguste Rodin, The Thinker (1880) M. C. Escher, Bond of Union (1956) Q: Have we made any progress? How to measure progress?...
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This note was uploaded on 12/18/2010 for the course UGS 303 taught by Professor Foster during the Spring '08 term at University of Texas at Austin.

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Lecture23 - there wondering, fearing. (E.A. Poe, The Raven...

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