DESI Butterfly Plot (with inset and labels)

This slice of the DESI data maps celestial objects from Earth (center) to billions of light-years away. Among the objects are nearby bright galaxies (yellow), luminous red galaxies (orange), emission-line galaxies (blue), and quasars (green). The large-scale structure of the Universe is visible in the inset image, which shows the densest survey region and represents less than 0.1% of the DESI survey’s total volume. DESI is mounted on the U.S. National Science Foundation Nicholas U. Mayall 4-meter Telescope at Kitt Peak National Observatory (KPNO), a Program of NSF NOIRLab.