Introduction to Astrophysics

Yale Course , Spring 2007 , Prof. Charles Bailyn

135 students enrolled

Overview

Planetary Orbits - Our Solar System and the Pluto Problem - Discovering Exoplanets: Hot Jupiters - Planetary Transits - Microlensing, Astrometry and Other Methods - Direct Imaging of Exoplanets - Introduction to Black Holes - Special and General Relativity - Tests of Relativity - Special and General Relativity - Stellar Mass Black Holes - Pulsars - Supermassive Black Holes - Hubbles Law and the Big Bang - Omega and the End of the Universe - Dark Matter - Dark Energy and the Accelerating Universe and the Big Rip - Supernovae - Other Constraints: The Cosmic Microwave Background - The Multiverse and Theories of Everything

Lecture 20: Dark Matter

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        Lecture Details

        FrontiersControversies in Astrophysics (ASTR 160) This lecture introduces an important concept related to the past and future of the universe the Scale factor, which is a function of time. With reference to a graph whose coordinates are the Scale factor and time, the problem of dark matter is addressed again. Cosmological redshifts are measured to determine the scale of the universe. The discovery of the repulsive, anti-gravitational force of dark energy is explained. The lecture concludes with discussion of Einsteins biggest mistake the invention of the cosmological constant to balance gravity. 0000 - Chapter 1. The Scale Factor 0441 - Chapter 2. Accounting for Dark Matter in Mass of Universe 2758 - Chapter 3. Discovery of Dark Energy 4206 - Chapter 4. Understanding Dark Energy and Einsteins Biggest Mistake Complete course materials are available at the Open Yale Courses website httpopen.yale.educourses This course was recorded in Spring 2007.

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