BOSS Fiber Cartridge (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption This is one of the BOSS fiber cartridges, containing 1,000 optical fibers that guide light from a "plug plate" targeting specific galaxies and quasars to the spectrograph; Sloan Foundation telescope is in the background. Credit Dan Long, Senior Operations Engineer, Apache Point Observatory Usage Restrictions with credit as above License Licensed content 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.