DESI Installed on the Mayall 4-meter Telescope

The Dark Energy Spectroscopic Instrument (DESI) is installed on the Nicholas U. Mayall 4-meter Telescope at Kitt Peak National Observatory near Tucson, Arizona. 

The most powerful multi-object survey spectrograph in the world, DESI is an international science collaboration managed by the Lawrence Berkeley National Laboratory with primary funding for construction and operations from the US Department of Energy’s Office of Science.