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

Microwave Background Radiation

• Detection: Penzias & Wilson
• Radiation in the early universe:
  spectrum
  temperature pattern
• temperature fluctuations: seeds of structure
  Mather & Smoot

The Nuclear Era: Big Bang Nucleosynthesis

• Light element formation
• the elements: big bang to now

The Very Early Universe

• Fermilab:
  sky view, tunnel, CDF detector, real-time collisions
• CERN's Large Hadronic Collider (LHC); detector: end-on, real-time
• the Universe as "the poor man's accelerator"

Remaining Questions

Last Words