❖ The Five-hundred-meter Aperture Spherical Telescope (FAST) is situated in karst region in Guizhou, southwest China.

❖ Now a second phase will add 24 new moveable radio telescopes, each with a diameter of 131 feet (40 meters).

❖ This expansion is named the FAST Core Array.

❖ It aims to make use of the "quiet" electromagnetic environment that exists within a 3-mile (5 kilometers) radius around the telescope