WE observe
small anisotropy
(redshift/
blueshift on
opposite
sides of sky)
Doppler
shift due to earth’s
motion
through universe
(radiation
field)
Solar
system 370 km/s towards Leo
red => warmer
blue => cooler
Spatial fluctuations in CMB on small angular
scales
® information on inhomogeneities that form
galaxies
and clusters of galaxies
CMB istropic® universe isotropic