Dark Energy Spectroscopic Instrument (DESI) (image) DOE/Lawrence Berkeley National Laboratory Share Print E-Mail Caption The Dark Energy Spectroscopic Instrument (DESI) will be mounted on the 4-Meter Mayall telescope at Kitt Peak National Observatory. It will collect spectra from 30 million galaxies and quasars to make the biggest 3-D map of the universe ever. Credit R. Lafever and J. Moustakas for the DESI Collaboration, background image by Dark Energy Camera Legacy Survey. Usage Restrictions None Share Print E-Mail 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.