Atacama Large Millimeter Array
The Atacama Large Millimeter/sub-millimeter Array (ALMA) is an array of radio telescopes in the Atacama Desert of northern Chile.  A high and dry site is very important for millimeter wavelength work.  ALMA is being built on the Chajnantor plateau at 5000 metres altitude.  It will have 66 12-meter and 7-meter diameter radio telescopes observing at millimeter and sub-millimeter wavelengths. ALMA is expected to help scientists understand how stars were created during the early universe. It will also provide detailed imaging of local star and planet formation.