BOSS, the Baryon Oscillation Spectroscopic Survey, is the most ambitious attempt yet to map the expansion history of the Universe using the technique known as baryon acoustic oscillation. Part of the Sloan Digital Sky Survey III, BOSS achieved "first light" on the night of Sept. 14-15, when it acquired data with its upgraded spectrographic system across the entire focal plane of the Sloan Foundation telescope at Apache Point Observatory. ...> Full Article
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