This and subsequent lectures on the CMB borrow extensively from Wayne Hu's excellent web page at http://background.uchicago.edu/~whu/physics/physics.html
Before reionization, universe is opaque, matter and radiation tightly coupled
What temperature does recombination happen at? Why so cool?
Photons outnumber baryons by a factor of about 10**9
Hu temperature map: the world at COBE resolution
Hu temperature map: COBE CMB monopole
Hu temperature map: COBE CMB dipole
Hu temperature map: COBE noise
Hu temperature map: Power spectrum
Hu temperature map: Maxima and Boomerang
Hu temperature map: Power spectrum circa 2000
Horizon scales and initial conditions
The structures we see today grew from tiny density fluctuations in the early universe
Sachs-Wolfe effect: gravitational redshift
What causes this acoustic oscillations?