China Allows Foreign Astronomers to Use its Radio Telescope to Look for Aliens Published January 5th, 2021 - 11:48 GMT To date, its systems have recorded at least 240 pulsars, including a 'millisecond pulsar' that is spinning 18,990 rotations per minute. AFP/FILE Highlights Approximately 10 percent of observation slots will be allotted to foreigners. China will permit foreign astronomers to use its 1,600-foot radio telescope for the first time this summer. The Five-hundred meter Aperture Spherical radio Telescope (FAST) is the world's largest single-disc radio observatory, used for spotting cosmic phenomena and searching for extraterrestrial life. It's one of the only 'Sky Eyes' remaining after the decommissioning and collapse of Arecibo Observatory's 1,000-foot radio telescope in December.