שיעור 11 מבוא לקוסמולוגיה
Observational facts Density contrast at small scales
Anisotropy at small scales
Homogeneity and isotropy at large scales Homogeneity and isotropy at large scales
Olbers’ paradox Why the sky is dark ? Olbers’ paradox Why the sky is dark ?
Hubble expansion 1929 redshift
1996
Expanding space
Distance: coordinates and proper distances Distance: coordinates and proper distances
Lookback time
Looking into past Looking into past
Curvature
Cosmological resdshift Cosmological resdshift
Cosmological change of angular size Cosmological change of angular size
Horizons
Test particle
Friedmann’s equations
Deceleration parameter and critical density Deceleration parameter and critical density
How parameters depend on a ?