23. Other Constraints: The Cosmic Microwave Background
Μεταφορτώθηκε στις 29 Σεπ 2008
Frontiers/Controversies in Astrophysics (ASTR 160)
Reasons
for the expansion of the universe are addressed at the start of this
lecture, focusing especially on the acceleration of dark energy.
Supernovae were the first evidence for the existence of dark energy. Two
other proofs are presented. The first is the Cosmic Microwave
Background, which is a form of electromagnetic radiation that is
perfectly smooth and equal in all directions. It firmly supports the Big
Bang theory. Projects attempting to measure it, such as COBE and WMAP,
are discussed. Secondly, Large-Scale Clustering is introduced: by
measuring the degree of clustering, astronomers hope to advance their
understanding of dark energy and dark matter. Computer simulations of
the evolution of the universe are shown.
00:00 - Chapter 1. Implications of Research on Supernovae
05:28 - Chapter 2. The Cosmic Microwave Background
11:27 - Chapter 3. COBE and WMAP: Measuring CMB
24:40 - Chapter 4. Growth of Universe Structure: Large-Scale Clustering
39:30 - Chapter 5. The Degree of Clustering and the Potential Fates of the Universe
Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses
This course was recorded in Spring 2007.
Reasons
for the expansion of the universe are addressed at the start of this
lecture, focusing especially on the acceleration of dark energy.
Supernovae were the first evidence for the existence of dark energy. Two
other proofs are presented. The first is the Cosmic Microwave
Background, which is a form of electromagnetic radiation that is
perfectly smooth and equal in all directions. It firmly supports the Big
Bang theory. Projects attempting to measure it, such as COBE and WMAP,
are discussed. Secondly, Large-Scale Clustering is introduced: by
measuring the degree of clustering, astronomers hope to advance their
understanding of dark energy and dark matter. Computer simulations of
the evolution of the universe are shown.
00:00 - Chapter 1. Implications of Research on Supernovae
05:28 - Chapter 2. The Cosmic Microwave Background
11:27 - Chapter 3. COBE and WMAP: Measuring CMB
24:40 - Chapter 4. Growth of Universe Structure: Large-Scale Clustering
39:30 - Chapter 5. The Degree of Clustering and the Potential Fates of the Universe
Complete course materials are available at the Open Yale Courses website: http://open.yale.edu/courses
This course was recorded in Spring 2007.
ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/3/2014
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