Archenhold Observatory

Treptow-Köpenick, Germany · built 1909

The Archenhold Observatory (Archenhold-Sternwarte) was named in honour of Friedrich Simon Archenhold, is an observatory in Berlin-Treptow. It houses the Großer Refraktor (Great Refractor), which is the longest pointable telescope in the world. It is also called Die Himmelskanone (Celestial Cannon).

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Observatory data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).

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