Education For All

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

Lectures (Video)

Course Home

Frontiers and Controversies in Astrophysics - Lecture 16

Get the Flash Player to view video.
Lecture 16 - Hubble's Law and the Big Bang

The third and final part of the course begins, consisting of a series of lectures on cosmology. A brief history of how cosmology developed into a scientific subject is offered. The discovery of dark energy, along with dark matter, played a crucial role in the development of cosmology. The lecture then discusses the discovery of spiral nebulae in 1920, as well as the "Great Debate" over what they were. Hubble's famous redshift diagram is presented as the basis for Hubble's Constant and Big Bang cosmology. The difficulty of measuring distance of objects in space, and how to do it using the parallax method and the standard candle method, are discussed. Measure brightness using the magnitude scale is explained. Class ends with a review of logarithms.

Prof. Charles Bailyn
ASTR 160 - Frontiers and Controversies in Astrophysics, Spring 2007
(Yale University: Open Yale)
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.)



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