Sunyaev-Zel'dovich Array
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The Sunyaev-Zel'dovich Array (SZA) in California is surveying the Cosmic Microwave Background to find clusters of galaxies. It has a similar design and similar astronomical goals to the Arcminute Microkelvin Imager. Observations commenced at the Sunyaev-Zel'dovich Array in April 2005.