A Colorful Night

March 18, 2025

DESI maps distant objects to study dark energy. The instrument is installed on the Mayall Telescope, shown here beneath star trails.
Credit: KPNO/NOIRLab/NSF/AURA/B. Tafreshi

A long-exposure image captures circular star trails above telescope domes illuminated in red light on a dark mountain. A golden glow on the horizon marks distant city lights.

DESI on the Mayall Telescope