ALMA Observatory

Atacama Large Millimeter Array (ALMA) Observatory in Chile. The ALMA observatory is comprised of 66 high-precision radio telescopes of 12 m diameter arranged in two arrays, located at an elevation of 5,000 m (16,400 ft) at the Chajnantor plateau. The project cost $1.4 billion, making it the world’s most expensive ground telescope, and it was developed thanks to a multi-national effort involving the United States, Europe, Canada, Japan, South Korea, Taiwan, and Chile.