Lifestyles in an Expanding Universe
- expansion described: scale factor
- expansion and areas, volumes
- from Einstein to Hubble
- analogies: raisin cake; balloon
Expansion and Redshifts
- animation in balloon analogy
- effect on galaxy spectra
- redshift recordholder
- cosmic time dilation: recently confirmed using distant supernovae
Expansion and Cosmic Contents
- effect on matter density
- effect on radiation density
Expansion Explained: Friedmann's Equations
