Cosmosphere \Cos"mo*sphere\ (k[o^]z"m?-sf?r), n. [Gr. ko`smos
the world + E. sphere.]
An apparatus 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.
[1913 Webster]