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

Drone footage of the Víctor M. Blanco 4-meter Telescope located at the Cerro Tololo Inter-American Observatory, a program of NSF's 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.