European Southern Observatory

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 
 Country Accession  1962  1962  1962  1962  1962  1967  1981  24 May 1982  27 June 2000  8 July 2002  1 July 2004  1 July 2006  1 January 2007  1 July 2008  28 October 2014  28 September 2018

Category:Astronomical observatories in Chile
Category:1962 establishments in Europe