BOSS First-Light Spectrum (image) DOE/Lawrence Berkeley National Laboratory 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 Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.