The Accelerating Universe

Extending the Hubble Diagram
The linear Hubble Law is only an approximation. The rate of expansion in the
past depends on the matter/energy density of the universe.
H 2 (a) H 2 = (a) H 02 = [ HΩ m a -3 + Ω Λ + (1- m - Ω Λ ) a -2 02 [ Ω m a -3 + (1- Ω m ) a -2 ] ]
Redshift = velocity
Hubble Diagram
Look far enough
⇒See deviation
from a line
Distance between 2 galaxies
Size
God’s Eye View
Distance from Us
Time