FAST, THE CELESTIAL EYE

With its 500-metre aperture, the FAST radio telescope is designed to detect radio signals emitted tens of thousands of light-years from Earth.

But to build an instrument of such extraordinary dimensions, engineers had to overcome an unprecedented challenge: to create a giant radio receiver deep in the mountains.

This film takes us behind the scenes of a Pharaonic construction site. From technological innovations to architectural challenges, we follow every step of the construction of the largest radio telescope ever built.