David Schlegel (IMAGE) DOE/Lawrence Berkeley National Laboratory Caption David Schlegel, principal investigator of BOSS, shows one of the numerous "plug plates" used to map and select hundreds of galaxies for each exposure. Light from each galaxy enters a hole in the plate and is carried to the CCD camera by its own optical fiber. Credit Roy Kaltschmidt, Lawrence Berkeley National Laboratory Usage Restrictions with credit 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.