Abstract
The cosmic microwave background radiation (CMB) carries with it information about the prevailing conditions in the early universe. Precise measurements of the CMB in an adequate range of angular scales and frequencies will make it possible to find values for the most important cosmological parameters: curvature, cosmological constant and shape of the primordial fluctuation spectrum. The COBE satellite has made it possible to advance considerably in this task with the measurement of anisotropies at angular scales ≥ 7°. An introduction to the CMB theory is presented, the most recent results from COBE are presented, and a test of open cosmological models and models with cosmological constant is performed using the COBE-DMR maps. The result of this analysis reveals that these date are consistent with open cosmological models favoring a value for the density parameter of Ω=0.8 . The data also allow for a non-zero cosmological constant.
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