Wilkinson Microwave Anisotropy Probe
In early 2003, the first results of the Wilkinson Microwave Anisotropy Probe were released, yielding what were at the time the most accurate values for some of the cosmological parameters. The results disproved several specific cosmic inflation models, but are consistent with the inflation theory in general. The "Planck" space probe was launched in May 2009. Other ground and balloon-based cosmic microwave background experiments are ongoing.