Aerial view of the Víctor M. Blanco 4-meter Telescope.

Drone footage of the Víctor M. Blanco 4-meter Telescope located at Cerro Tololo Inter-American Observatory, a Program of NSF NOIRLab in Chile, peering up through its observing slit with the observatory dome rotating. The U.S. Department of Energy-built Dark Energy Camera (DECam) can be seen at the top of the telescope's truss structure.