A complex of astronomical telescopes and instruments located approximately 80 km to the east of La Serena at an altitude of 2200 Meters.

An intergovernmental organisation for astronomical research which operates several observatories in Chile. Features information about the facilities and telescopes, projects and activities, news releases, and resources.

Mauna Kea, Hawaii, and Cerro Pacha, Chile. Features news, information about the facilities and telescopes, web cams, and resources.

Features information about the facilities and telescopes, research, and resources.