Abstract: The Atacama Large Millimeter/Submillimeter Array (ALMA) is an interferometer array of 54_12m and 12_7m antennas, ALMA science will transform our vision of the cold, dusty, and gaseous universe, from extrasolar planets to the youngest galaxies. Receivers for the ALMA are designed to include 10 frequency bands. (ALMA) is an international effort to construct an instrument capable of matching the exquisite imaging properties of optical space telescopes at millimeter and submillimeter wavelengths. So this paper presents a review on different observatories of telescope.
Keywords: Telescopes, submillimeter, high angular resolution, interferometric.