"Lec 23 - Other Constraints: The Cosmic Microwave Background" 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.
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Tags: 2DF Anisotropy Probe Big Bang COBE Cosmic Background Explorer Microwave Cosmological Constant dark energy matter Degree Field growth structure ionization Large Scale Clustering Stephen Hawking supernova Two Wilkinson WMAP
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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 16 - Hubble's Law and the Big Bang
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