Billion galaxies in largest map of sky yet

Kitt Peak National Observatory and Cerro Tololo Inter-American Observatory imagery has been used to deliver the "largest ever map of the sky, comprising over a billion galaxies," according to the National Science Foundation's Noirlab. Credit: KPNO/CTIO/NOIRLab/NSF/AURA/Legacy Imaging Survey, P. Marenfeld, D. Munizaga, Lawrence Berkeley National Lab. Music: Stellardrone - Airglow.