High Quality Content by WIKIPEDIA articles! There have been a variety of experiments to measure the Cosmic microwave background (CMB) radiation anisotropies and polarization since its first observation in 1964 by Penzias and Wilson. These include a mix of ground-, balloon- and space-based receivers. The most notable of these are COBE, which first detected the temperature anisotropies of the CMB, and showed that it had a black body spectrum; DASI, which first detected the polarization signal from the CMB; CBI that made high-resolution observations and obtained the first E-mode polarization spectrum and WMAP, which has provided the best full-sky CMB maps to date. Planned future experiments include the Planck spacecraft, which aims to produce high-resolution all-sky maps of both the temperature anisotropies and polarization signals, and various ground-based experiments primarily intended to investigate small-scale anisotropies and trying to detect the polarization caused by gravitational...

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