18. Hubble's Law and the Big Bang (cont.)
Μεταφορτώθηκε στις 29 Σεπ 2008
Frontiers/Controversies in Astrophysics (ASTR 160)
Professor
Bailyn returns to the subject of the expansion of the universe to offer
explanations that do not require belief in the Big Bang theory. One
alternative is a theory that, in the past, the entire universe was
reduced to an "initial singularity," in which everything was much
closer, and therefore denser and hotter. Since the universe is in
constant flux, however, it follows that in the future things will drift
apart. The Steady State explanation for the expansion of the universe is
then explained. Coined as a derogatory term meant to ridicule
supporters of the Big Bang theory, Steady State purports that new energy
and matter are constantly created as the universe expands, to fill in
the void that results from the expansion. The discovery of quasars
refuted the Steady State theory. The lecture ends with a discussion of
how observing very distant objects allows us to look back in time, and
also gives us a glimpse into the future of galaxies and the universe.
00:00 - Chapter 1. The Expanding Universe -- Big Bang and Steady State Theories
09:53 - Chapter 2. Quasars and the Rejection of the Steady State Theory
32:21 - Chapter 3. Calculating the Duration of the Big Bang
43:16 - Chapter 4. Calculating the Potential Future 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.
Professor
Bailyn returns to the subject of the expansion of the universe to offer
explanations that do not require belief in the Big Bang theory. One
alternative is a theory that, in the past, the entire universe was
reduced to an "initial singularity," in which everything was much
closer, and therefore denser and hotter. Since the universe is in
constant flux, however, it follows that in the future things will drift
apart. The Steady State explanation for the expansion of the universe is
then explained. Coined as a derogatory term meant to ridicule
supporters of the Big Bang theory, Steady State purports that new energy
and matter are constantly created as the universe expands, to fill in
the void that results from the expansion. The discovery of quasars
refuted the Steady State theory. The lecture ends with a discussion of
how observing very distant objects allows us to look back in time, and
also gives us a glimpse into the future of galaxies and the universe.
00:00 - Chapter 1. The Expanding Universe -- Big Bang and Steady State Theories
09:53 - Chapter 2. Quasars and the Rejection of the Steady State Theory
32:21 - Chapter 3. Calculating the Duration of the Big Bang
43:16 - Chapter 4. Calculating the Potential Future 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.
ΑΝΑΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 20/3/2014
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