A new instrument on the 4-m Mayall telescope has opened its array of thousands of fiber-optic "eyes" to the cosmos and successfully captured the light from distant galaxies. The milestone marks the beginning of final testing for the Dark Energy Spectroscopic Instrument (DESI), which is poised to begin creating the most detailed map of the Universe ever undertaken. The Mayall telescope is located at Kitt Peak National Observatory (KPNO), which is operated by the National Science Foundation's National Optical-Infrared Astronomy Research Laboratory (NSF's OIR Lab).
