Effelsberg 100-m Radio Telescope

The Effelsberg 100-m Radio Telescope is a radio telescope in the Ahrgebirge (part of the Eifel) in Bad Münstereifel, district of Euskirchen, North Rhine-Westphalia, Germany. For 29 years the Effelsberg Radio Telescope was the largest fully steerable radio telescope on Earth. In 2000 it was surpassed by the Robert C. Byrd Green Bank Telescope in Green Bank, West Virginia with an elliptical 100 by 110-metre aperture.