COSMOSPHERE
Etymology
Noun
cosmosphere (plural cosmospheres)
An apparatus for showing the position of the Earth with respect to the fixed stars, consisting of a hollow glass globe marked with the stars and constellations and containing a terrestrial globe.
Source: Wiktionary
Cos"mo*sphere (kz"m-sfr), n. Etym: [Gr. sphere.]
Definition: An apparattus for showing the position of the earth, at any
given time, with respect to the fixed stars. It consist of a hollow
glass globe, on which are depicted the stars and constellations, and
within which is a terrestrial globe.
Source: Webster’s Unabridged Dictionary 1913 Edition