An [b]armillary sphere[/b] (variations are known as [b]spherical astrolabe[/b], [b]armilla[/b], or [b]armil[/b]) is a model of objects in the [[sky]], consisting of a spherical framework of rings, centered on Earth or the Sun, that represent lines of celestial longitude and latitude and other astronomically important features such as the ecliptic. As such, it differs from a [[celestial globe]], which is a smooth sphere whose principal purpose is to map the [[constellation]]s.

h4. See also

* [[Planetarium]]
* [[Celestial Globe]]

h4. External links

* "Wikipedia: Armillary sphere":https://en.wikipedia.org/wiki/Armillary_sphere
アーミラリ天球儀 渾天儀 天球儀