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nouna building housing an instrument for projecting the positions of the planets onto a domed ceiling
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nounan apparatus or model for representing the solar systemstype of:
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nounan optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dometype of:
Definition that contains planetarium
- orrery planetarium consisting of an apparatus that illustrates the relative positions and motions of bodies in the solar system by rotation and revolution of balls moved by wheelwork; sometimes incorporated in a clock