Was there a late 80s to early 90s light drama or sitcom in which a character had an observatory attached to the house?
Stargazer in sitcom?
The only similar thing I can think of was Jonathan Creek who lived in a windmill.
Can only think of Supernova with Rob Brydon, but that was mid 2000s
Any other details you know of?
Did it have a guy in a monacle playing the xylophone?
Could it be Supernova, Rob Brydon as a British astronomer in Australia.