In October 2011, a radio astronomy telescope called the Atacama Large Millimeter Array, built by European countries, Japan, the United States, Canada and Chile, was installed there at the Llano de Chajnantor Observatory. Since 1999, several radio astronomy projects have been underway in the Chajnantor region, and in 2010 it was decided to build the Extremely Large Telescope on Cerro Armazones mountain. Its launch (first light) is scheduled for 2027.
