Berlin, Germany c. 1914The giant Treptow telescope at the Archenhold Observatory in Berlin. It is 21 meters in length and is the longest moveable refracting telescope on Earth. Editorial Stock Photo - Afloimages
Berlin, Germany: c. 1914
The giant Treptow telescope at the Archenhold Observatory in Berlin. It is 21 meters in length and is the longest moveable refracting telescope on Earth.