A group of galaxies nicknamed the Copeland Septet, in the constellation of Leo. Astronomers using images from Kitt Peak National Observatory and Cerro Tololo Inter-American Observatory have created the largest ever map of the sky, comprising over a billion galaxies. The final data release from the ambitious DESI Legacy Imaging Surveys sets the stage for a ground-breaking 5-year survey with the Dark Energy Spectroscopic Instrument (DESI), which aims to provide new insights into the nature of dark energy. Credit: KPNO/CTIO/NOIRLab/NSF/AURA/Legacy Imaging Survey ----------------------------------------------------------------------------------------------------- Giant Map of the Sky Sets Stage for Ambitious DESI Survey Astronomers using images from Kitt Peak...