This film reveals the technological leaps forward that enabled the world’s largest optical telescope (by effective optical aperture) to be built. The Large Binocular Telescope sits on a mountain in Arizona over 3,000 metres above sea level. Equipped with two huge mirrors, this giant pair of eyes stares up into the night sky. Capable of producing images of heavenly bodies with startling clarity, the LBT focuses its mirrors on stars tens of millions of light years away from Earth.