Archenhold Observatory

Archenhold Observatory stands in Berlin-Treptow as one of Germany's most distinctive astronomical facilities, named in honour of Friedrich Simon Archenhold. Since 1909, it has drawn visitors and researchers to experience its remarkable central instrument.

About Archenhold Observatory

The observatory's defining feature is the Großer Refraktor, known as the Great Refractor or Celestial Cannon. This telescope holds the distinction of being the world's longest pointable telescope, an engineering achievement that has made it scientifically and historically significant for over a century.

History

Founded in 1909, Archenhold Observatory was established to make astronomical observation accessible to Berlin's public. The institution operates today as part of the Berlin Planetarium Foundation's offerings, continuing its mission to engage visitors with the night sky.

Location & Getting There

The observatory is situated in Berlin-Treptow at an elevation of 41 metres, in Germany's capital city. The Treptow location provides good access from central Berlin and sits within a historic district of the city.

Visiting Archenhold Observatory

The observatory welcomes visitors for tours, exhibitions, and guided observations. For current information about visiting hours, guided tours, events and ticket prices, contact the Berlin Planetarium Foundation directly at 030 / 421 845-0 or visit planetarium.berlin/. Check ahead before travelling to confirm opening times and available programmes.

See Your Named Star from Here

A named star from our star-naming packages can be observed from Archenhold using its powerful telescopes. Museum staff can point the Great Refractor at any celestial coordinates, including the RA and Dec of a star you have registered. Browse our star catalogue to find your star and plan an observing session.