noun
armillary sphere
Historical astronomical instrument consisting of a model of the celestial sphere with rings representing the equator, ecliptic, etc. Used in East Asian astronomy.
See also: 天球儀
渾天儀は、古代中国で天体の位置を測るために使われた。
The armillary sphere was used in ancient China to measure the positions of celestial bodies.
From Chinese 渾天儀 (húntiānyí), literally 'complete-sky instrument'. The exact historical derivation is uncertain; the spelling is conventionally associated with the armillary sphere.