The first year data from the Wilkinson Microwave Anisotropy Probe (WMAP) satellite has been analysed to make all-sky maps at 5 microwave frequencies. These have been used to measure the Cosmic Microwave Background (CMB) anisotropy. The WMAP results mesh extremely well with other cosmological observations, including previous CMB anisotropy measurements, and produce a remarkably consistent picture of a Universe made up of with 70% dark energy, 25% dark matter and 5% baryonic matter. In the future, a refined analysis which includes polarization maps and the additional second year of WMAP data will be combined with data from currently being constructed experiments. These results will give new tests of the cosmological models and constraints on their parameters.

Refreshements at 3:50 pm, Phy/Geo Bldg. Entrance