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Contact: Paul Preuss
DOE/Lawrence Berkeley National Laboratory

BOSS First-Light Spectrum

Caption: This is a previous optical image of one of the approximately 200 quasars captured in the Baryon Oscillation Spectroscopic Survey (BOSS) "first light" exposure is shown at top, with the BOSS spectrum of the object at bottom. The spectrum allows astronomers to determine the object's redshift. With millions of such spectra, BOSS will measure the geometry of the Universe.

Credit: David Hogg, Vaishali Bhardwaj, and Nic Ross of SDSS-III

Usage Restrictions: with credit as given

Related news release: First light for BOSS -- a new kind of search for dark energy

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