George McVittie

• UIUC Astronomy Professor and Department Head
• "second generation" relativist
• studied under Eddington
• a pioneer of relativistic cosmology
• author of General Relativity and Cosmology (1956, 1965)

Physics in a FLRW Universe

• redshifts
• time dilation observed in extragalactic Type Ia supernovae!
  
  • light curve width (1996, 2008)
  • evolution of spectral features (2005)
• distance measures
  • luminosity distance
  • angular diameter distance
    implications: CMB flucutations yield cosmic paramters
  • particle horizon
• causality in a FLRW universe