European Southern Observatory
Chilean observation sites
Although ESO is headquartered in Germany, its telescopes and observatories are in northern Chile, where the organisation operates advanced ground-based astronomical facilities: La Silla, which hosts the New Technology Telescope (NTT) Paranal, where the Very Large Telescope (VLT) is located Llano de Chajnantor, which hosts the APEX (Atacama Pathfinder Experiment) submillimetre telescope and where ALMA, the Atacama Large Millimeter/submillimeter Array, is located These are among the best locations for astronomical observations in the southern hemisphere.

European Southern Observatory

Section Title: Chilean observation sites
Table Section Text: Although ESO is headquartered in Germany, its telescopes and observatories are in northern Chile, where the organisation operates advanced ground-based astronomical facilities: La Silla, which hosts the New Technology Telescope (NTT) Paranal, where the Very Large Telescope (VLT) is located Llano de Chajnantor, which hosts the APEX (Atacama Pathfinder Experiment) submillimetre telescope and where ALMA, the Atacama Large Millimeter/submillimeter Array, is located These are among the best locations for astronomical observations in the southern hemisphere.

ESO telescopes

Name	Short	Size	Type	Location	Year

ESO 3.6 m telescope – hosting HARPS	ESO 3.6m	3.57 m	optical and infrared	La Silla	1977

MPG/ESO 2.2 m telescope	MPG	2.20 m	optical and infrared	La Silla	1984

New Technology Telescope	NTT	3.58 m	optical and infrared	La Silla	1989

Very Large Telescope	VLT	4 × 8.2 m 4 × 1.8 m	optical to mid-infrared, array	Paranal	1998

Atacama Pathfinder Experiment	APEX	12 m	millimetre-/submillimetre-wavelength	Chajnantor	2005

Visible and Infrared Survey Telescope for Astronomy	VISTA	4.1 m	near-infrared, survey	Paranal	2009

VLT Survey Telescope	VST	2.6 m	optical, survey	Paranal	2011

Atacama Large Millimeter/submillimeter Array	ALMA	50 × 12 m 12 × 7 m 4 × 12 m	millimetre-/submillimetre-wavelength interferometer array	Chajnantor	2011

Extremely Large Telescope	ELT	39.3 m	optical to mid-infrared	Cerro Armazones	2024

A ALMA is a partnership among Europe, the United States, Canada, East Asia and the Republic of Chile. · Additional ESO research facilities are located in Santiago, Chile and include a library, computing resources and programmes for visiting scientists.

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The New Technology Telescope (NTT) is a 3.58-metre telescope, inaugurated in 1989.

final_sentence: The New Technology Telescope (NTT) is a 3.58-metre telescope, inaugurated in 1989.