Big Picture Chemistry
Chapter 2: The Stars that Make Us
The Light Year
A perspective on how fast light travels is given followed by an introduction to the light-year, which is a basic unit of astronomical distances. Duration: 4:45.
Looking Back in Time (1 of 3)
Clusters of galaxies move away from each other as the space between them expands: Duration: 8:46.
Looking Back in Time (2 of 3)
There is no space outside the universe. All space as we currently understand it, resides within the universe. Duration: 6:20.
Looking Back in Time (3 of 3)
The CMBR and the abundance of helium in the universe are discussed as evidence supporting Big Bang theory. Duration: 7:51.
Watch these additional videos to complete this tutorial.
