Differ with other binoculars, FAST both neither is to wear in the summit, also not travel outer space, and choose in our country Guizhou base oneself upon of ground of a karst 窪. This entablature diameter 500 meters spherical radio telescope, like a tremendous day look, by 2000 baffle-board of 15 meters of square mosaic. Its appearance is exactly like antenna of boiler type satellite, the area is equivalent to 25 football grounds, with the diameter 305 meters world has photograph of radio telescope of the biggest stationary to compare, but observation sky limits enlarged 4 times, sensitivity raised 2.3 times, connect radiant energy measures the celestial bodies of cosmic brim to all can stop eye ground besides 11 billion light-year.
Of course, the utility of FAST binoculars can not be range estimation sky only, it still can reproduce the universe the image of infantile period. Original, cosmic encyclopedia is to use 21 centimeters of faint hydrogen to the book is written and be become, the FAST telescopic just of high delicacy can understand code of this kind of neuter hydrogen, find out the generation celestial bodies that at the beginning of the universe explodes greatly, is born finally.