This is the category for the European Southern Observatory, an intergovernmental research organization of sixteen countries, doing ground-based astronomical observation at locations in northern Chile. 
The full name is European Organisation for Astronomical Research in the Southern Hemisphere.
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An ESO telescope at the La Silla Observatory in Chile.  (Image: European Southern Observatory)
This category has only the following subcategory.
The following 8 pages are in this category, out of 8 total.
Category:European Southern Observatory