Why did the completion of the main body of China's FAST 500m aperture spherical radio telescope attract warm attention at home and abroad? The reason lies in its three high-energy stunts  One is to see far away  As the largest radio telescope at present, FAST can theoretically receive electromagnetic signals beyond 13 7 billion light-years  Second, it is very flexible  The cable net structure of FASt can change with the movement of celestial bodies, drive 4450 reflection elements on the cable net, and form a 300m aperture instantaneous paraboloid in the direction of the radio source, which greatly improves the observation efficiency  The third is high precision  FASt radio telescope 500m structure, everywhere is millimeter precision requirements; used to weave the cable net of more than 7000 arm-thick steel cables, each one of the processing accuracy is controlled within one millimeter; the final 500m aperture antenna accuracy is 3 millimeters, the manufacturing accuracy of each small panel is 1 5mm
All this means that we will be able to observe the more hidden mysteries of the universe
FAST into China into the depths of the universe