European Southern Observatory
| Formation | 1962 |
|---|---|
| Type | research organization for astronomy |
Membership | 14 member countries |
| Website | www.eso.org |
The European Southern Observatory (ESO, officially called the European Organization for Astronomical Research in the Southern Hemisphere), is a research group for astronomy, made up of fourteen countries from Europe. Made in 1962 to give state-of-the-art facilities and a view the Southern Sky to European astronomers, it is well known for using some of the largest and most advanced telescopes in the world, such as the New Technology Telescope (NTT), the telescope that helped create active optics technology, and the VLT (Very Large Telescope), made of four 8-meter class telescopes and four 1.8-m Auxiliary Telescopes.
Member countries[change]
| Country | Accession |
|---|---|
| File:Flag of Belgium (civil).svg Belgium | 1962 |
| File:Flag of Germany.svg Germany | 1962 |
| File:Flag of France.svg France | 1962 |
| File:Flag of the Netherlands.svg Netherlands | 1962 |
| File:Flag of Sweden.svg Sweden | 1962 |
| File:Flag of Denmark.svg Denmark | 1967 |
| File:Flag of Switzerland (Pantone).svg Switzerland | 1981 |
| File:Flag of Italy.svg Italy | 24 May 1982 |
| File:Flag of Portugal.svg Portugal | 27 June 2000 |
| File:Flag of the United Kingdom.svg United Kingdom | 8 July 2002 |
| File:Flag of Finland.svg Finland | 1 July 2004 |
| File:Flag of Spain.svg Spain | 1 July 2006 |
| File:Flag of the Czech Republic.svg Czech Republic | 1 January 2007 |
| File:Flag of Austria.svg Austria | 1 July 2008 |
| File:Flag of Poland.svg Poland | 28 October 2014 |
| File:Flag of Ireland.svg Ireland | 28 September 2018 |
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