View source for File:DESI on the Mayall 4-meter Telescope.jpg

== Summary ==
The Dark Energy Spectroscopic Instrument (DESI) installed on the Nicholas U. Mayall 4-metre Telescope at Kitt Peak National Observatory near Tucson, Arizona. DESI is the most powerful multi-object survey spectrograph in the world; it maps the expansion history of the universe and the growth of cosmic structure by measuring the redshifts of tens of millions of galaxies and quasars.
== Licensing ==
[[Q319|CC BY 4.0]]
== Attribution ==
Author: NOIRLab/KPNO/NSF/AURA/P. Marenfeld
Source: https://commons.wikimedia.org/wiki/File:The_Dark_Energy_Spectroscopic_Instrument_(DESI)_installed_on_the_Nicholas_U_Mayall_4-meter_Telescope_(noirlab-mayall-desi-1).jpg