Why has the completion of the main body of China's FAST (500 meter aperture spherical radio telescope) attracted warm attention at home and abroad? There are three reasons  First, it can see far  As the radio telescope with the largest caliber at present, FAST can theoretically receive electromagnetic signals beyond 13 7 billion light-years  Second, it is very flexible  FAST's cable net structure can change with the movement of celestial bodies, greatly improving the observation efficiency  Third, it is high precision  FAST's structure has millimeter accuracy requirements everywhere: it is used to weave steel cables as thick as the arm of the cable net, the machining accuracy is controlled within 1mm  The final accuracy of the antenna is 3mm and the manufacturing accuracy of the small panel is 1 5mm
All this means that we will be able to listen to the voices from deeper in the universe and observe the more hidden mysteries of the universe
Listen to voices from the depths of the universe