Largest Telescope Mirror Ever: A Look At How Big

Time-lapse video shows the immensity of what will one day be the integral part of the largest telescope (E-ELT) in the world - the nearly 11,000 square feet mirror. Attendees at the European Southern Observatory's Open House constructed the mock-up.
credit : ESO/M. Kornmesser/L. Calçada. Music: Movetwo.