Costing about US $1.4 billion , it is the most expensive ground - based telescope in operation .
ALMA is an international partnership among Europe , the United States , Canada , Japan , South Korea , Taiwan , and Chile .
Costing about US $1.4 billion , ALMA is the most expensive ground - based telescope in operation .
ALMA is an international partnership among Europe , the United States , Canada , Japan , South Korea , Taiwan , and Chile .