Cosmology
Where are the Galaxies: Structure of the Universe
- cosmological principle: homogeneous & isotropic
- actual data: 2dF Galaxy Redshift Survey
Galaxy Motion Relative to Us
- Hubble's law
- Hubble motion: artist's conception
The Expansion of the Universe
- demanded by homogeneity and isotropy
- scale factor
- raisin
cake analogy
balloon analogy
The Center of the Universe?
- demands of homogeneity and isotropy
- alternative location:
a short drive southwest of campus
Philo, IL: downtown landmark, zoom
The Future: Fate of the Universe
- Traditional view: gravity vs intertia
- New data: dark energy
