Notes
Outline
Cepheids are the key link
Distances to Nearby Galaxies
Galactic Redshifts
Distances deep into the Universe
Assigning a distance by redshift
Redshift takes us from 2-D to 3-D
Quasar Spectra and the “Lyman-alpha Forest”
Probing the Cosmic Foam
Hubble Expansion – what it is NOT
The motion is only “apparent”
Hubble Expansion – what it IS
There is no spatial center of expansion…
Local structure interferes with Hubble flow
The Hubble Constant and the Age of the Universe
Density is Destiny
Curvature of the Universe
Spacetime Diagrams
The Spacetime Diagram of an Expanding Universe
Lookback times
Notes