Title:  Results from the First Year of Observations of the 
Wilkinson Microwave Anisotropy Probe (WAMP) Satellite

Abstract:
I discuss the results of the first year of observation with the WMAP 
satellite.  The instrument has produced full sky maps at five frequencies 
from 20 to 100 GHz with the goal of  measuring the Cosmic Microwave 
Background (CMB) anisotropy from 0.2 to 180 degrees. These maps and the 
CMB angular power spectrum derived from them are sensitive tests of models 
of the conditions and history of the early universe.
Systematic effects in the measurements are small and well quantified owing 
to the design of the experiment. Galactic and extra-galactic foregrounds 
are characterized and separated from the CMB signal with high precision. 
The MAP data are combined with information from other cosmological 
probes  to extend the range of  models which are tested. Primary results 
from the first year are (1) Evidence for optical thickness of 0.17 implying 
early reinjection of energy. (2) Strong support for a Lambda CMB model. (3) 
Some surprising features which I will discuss.