•Flatness Problem – why so close
to a critical universe?
•Horizon Problem – why is
background all same T?
•
•SOLVED BY AN “INFLATIONARY UNIVERSE”
–“Grand Unified Theories” of
combined Gravity/Weak/Electric/Nuclear
forces predict very rapid expansion at very early time: “inflation”
–When inflation ends, all matter moving
away with v=vescape
(flat
universe – curvature forced to zero)
–Also solves horizon problem –
everything was in causal contact
•