China's Five-hundred-metre Aperture Spherical Telescope (FAST) is now the world's only giant, single-dish radio telescope following the collapse of the Arecibo Observatory in Puerto Rico. While FAST is larger and more sensitive, Arecibo possessed unique capabilities, such as transmitting signals to study solar system objects and track near-Earth asteroids.
FAST became fully operational in early 2020 and is expected to become available for use by foreign scientists in 2021. The article notes that the Chinese operator of the telescope did not provide an immediate comment on its current status.
The main topics covered are the status of the world's major radio telescopes, the comparative capabilities of FAST and Arecibo, and the planned international access to FAST.