imaginary sphere of arbitrarily large radius, concentric with the observer
The celestial sphere is an imaginary sphere of enormous size centered on wherever you are standing, onto which all the stars and planets appear to be projected in the sky. It's a useful tool for astronomers and stargazers to map and describe the positions of objects in the night sky as if they were all equally distant from Earth.
AI-generated from the Wikipedia summary — may contain errors.
via Wikidata · CC0
via Wikidata sitelinks · CC0
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).