Education For All

www.edforall.net

Text size
  • Increase font size
  • Default font size
  • Decrease font size

Lectures (Video)

Course Home

Frontiers and Controversies in Astrophysics - Lecture 18

Get the Flash Player to view video.
Lecture 18 - Hubble's Law and the Big Bang III

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.

Prof. Charles Bailyn
ASTR 160 - Frontiers and Controversies in Astrophysics, Spring 2007
(Yale University: Open Yale)
http://oyc.yale.edu
Date accessed: 2009-05-12
License: Creative Commons BY-NC-SA

Lecture Material

To view the lecture material accompanying this lecture in a new window, please click the button below. If necessary, use the vertical or horizontal scrollbar in the new window to view more of the material or you can resize the window.

To download the above lecture material use this link. (Right-click and select Save Target As or Save Link As.)

Supplementary lecture material is listed below.

1. Problem Set 6
2. Problem Set 6 Solutions



 

Translate

Chinese (Simplified) French German Italian Japanese Korean Portuguese Russian Spanish
More educational resources: