ALMA is a millimeter/sub-millimeter telescope array composed of 66 antennas located at an altitude of 5000 m on the Chajnantor plateau in the Chilean Andes. ALMA operates at frequencies between 84 to 950 GHz (corresponding to wavelengths between 0.3 and 3.5 millimeter), where the atmosphere above Chajnantor is largely transparent. ALMA provides unprecedented sensitivity and resolution, down to 0.005 arcsec at the highest frequencies. Read more about ALMA at the ALMA Science Portal.
ALMA is a partnership of ESO (representing its member states), NSF (USA) and NINS (Japan), together with NRC (Canada), NSC and ASIAA (Taiwan), and KASI (Republic of Korea), in cooperation with the Republic of Chile.