16. Hubble's Law and the Big Bang
Μεταφορτώθηκε στις 29 Σεπ 2008
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.
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.
ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/3/2014
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