François Terby: a Leuven amateur astronomer 140 years ago

Much as a surprise to many Leuven inhabitants, once upon a time, all the way back to 1884, there lived an avid amateur astronomer called François Terby. He invested an enormous amount of money to build a 3-story observatory (brick walls, wooden dome) next to his house in the Bogaarden street.

His observations were mainly planetary, Jupiter and also Mars. Many drawings are available, and he corresponded with Schiaparelli in Milan about the ‘canals’ on Mars. His enthousiasm was such that he also could confirm these so-called-channels.

Yesterday I could visit the Leuven city archive, and some surprises came up:

  1. The 8″ refractor telescope was always called by Terby himself as a “Grubb” telescope, now it is unmistakenly mounted on a Thomas Cooke telescope mount.
  2. The observatory was not just a roof add-on, but a substantial seperate tower, including a proper foundation and a wooden dome, about 4 meters in diameter.

Now the hunt is on for the lost refractor. In 1961 the observatory was demolished.

The 8″ Grubb refractor, mounted on top of the Cooke mount. The wooden dome interior is visible, including an observation chair in the corner. Note also the windows in the observatory wall. Source: Leuven Stadsarchief.
The original building permit plans of 1884, approved by the city of Leuven. The red parts are new. note the substantial foundation and the central pier. Source: Leuven Stadsarchief.
Detail of the ra-efractor. Source: Leuven Stadsarchief.
“T. Cooke & Sons, York” Source: Leuven Stadsarchief.

This website only uses statistical cookies. No personal data is collected or shared.