TALK ABSTRACT:
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After one year orbiting around the 2nd Earth-Sun Lagrange point, the WMAP
observatory has delivered data that has allowed us to reconstruct full-sky maps
in five frequency bands (23 to 94GHz). Using these multifrequency data, 
the cosmic microwave background (CMB) can be separated from the foreground
signals. With 45 times the sensitivity and 33 times the angular resolutions
of the COBE mission, WMAP has vastly extended our knowledge of cosmology
allowing us to probe the physics of the photon-baryon fluid at recombination
and explore the time of early star formation. The cosmological parameters
determined by the WMAP mission are consistent with other CMB experiments and
with large scale structure measurements and together they portray a
lambda-dominated universe seeded by nearly-scale-invariant adiabatic
Gaussian fluctuations.  These and other aspects of the mission will be 
discussed.