
thumb|right|330px|Drawing of an above-ground view of Stjärneborg thumb|right|330px|Stjärneborg as it exists today
thumb|right|330px|Drawing of an above-ground view of Stjärneborg thumb|right|330px|Stjärneborg as it exists today
Stjärneborg ("Star Castle" in English) was Tycho Brahe's underground observatory next to his palace-observatory Uraniborg, located on Ven, an island in the Öresund between Zealand and Scania, Sweden, which was part of Denmark at the time.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).