Refers to an object that emits light, often used in astronomical or physical contexts.
太陽は最も身近な光体である。
The sun is the most familiar luminous body.
luminous body; light-emitting object
Compound of 光 (light) and 体 (body), literally 'light body'. The exact historical derivation is uncertain, but the term is used in modern Japanese for luminous celestial or physical bodies.