"Lec 16 - Hubble's Law and the Big Bang" Frontiers/Controversies in Astrophysics (ASTR 160) The third and final part of the course begins, consisting of a series of lectures on cosmology. A brief history of how cosmology developed into a scientific subject is offered. The discovery of dark energy, along with dark matter, played a crucial role in the development of cosmology. The lecture then discusses the discovery of spiral nebulae in 1920, as well as the "Great Debate" over what they were. Hubble's famous redshift diagram is presented as the basis for Hubble's Constant and Big Bang cosmology. The difficulty of measuring distance of objects in space, and how to do it using the parallax method and the standard candle method, are discussed. Measure brightness using the magnitude scale is explained. Class ends with a review of logarithms. 00:00 - Chapter 1. Introduction to Cosmology 03:34 - Chapter 2. Spiral Nebulae and Hubble's Redshift Diagram 17:35 - Chapter 3. Measuring the Distance of a Star: The Parallax Method 25:13 - Chapter 4. Measuring Brightness: The Standard Candle Method 38:06 - Chapter 5. Absolute and Apparent Magnitude 48:04 - Chapter 6. Conclusion Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses This course was recorded in Spring 2007.
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Tags: absolute magnitude apparent Big Bang cosmology dark energy distance ladder Doppler shift Edwin Hubble galaxy Great Debate Harlow Shapley diagram Hubble's constant island universe logarithm scale Milky Way nebula parallax method parsec Sirius spiral standard candle Vega
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Lec 1- Introduction to Frontiers Controversies in Astrophysics
Lec 3 - Our Solar System and the Pluto Problem
Lec 4 - Discovering Exoplanets: Hot Jupiters
Lec 6 - Microlensing, Astrometry and Other Methods
Lec 7 - Direct Imaging of Exoplanets
Lec 8 - Introduction to Black Holes
Lec 9 - Special and General Relativity
Lec 11 - Special and General Relativity (cont.)
Lec 12 - Stellar Mass Black Holes
Lec 13 - Stellar Mass Black Holes (cont.)
Lec 15 - Supermassive Black Holes
Lec 17 - Hubble's Law and the Big Bang (cont.)
Lec 18- Hubble's Law and the Big Bang (cont.)
Lec 19 - Omega and the End of the Universe
Lec 21 - Dark Energy and the Accelerating Universe and the Big Rip
Lec 23 - Other Constraints: The Cosmic Microwave Background