Bernhard Schaefer
@bernhardschaefer.bsky.social
Amateur astronomer 🔭 | Studied physics ⚛️ but later digressed 🤷♂️ | Walter Hohmann Observatory, Essen, Germany
September 20, 2025 at 4:31 PM
A second dome houses the world's largest heliometer which was used for determining the distances of the stars, also well worth a visit.
September 15, 2025 at 6:37 AM
A second dome houses the world's largest heliometer which was used for determining the distances of the stars, also well worth a visit.
The box contains the pendulum-driven tracking mechanism for the mount.
September 15, 2025 at 6:35 AM
The box contains the pendulum-driven tracking mechanism for the mount.
Karl Schwarzschild performed the first photographic astrometry on the smaller refractor mounted parallel.
September 15, 2025 at 6:33 AM
Karl Schwarzschild performed the first photographic astrometry on the smaller refractor mounted parallel.
September 7, 2025 at 9:33 PM
Truly a wonderful image!
August 14, 2025 at 6:55 AM
Truly a wonderful image!