planetarium
(noun)
noun
1. a building housing an instrument for projecting the positions of the planets onto a domed ceiling
Definition categories: man–made, building, edifice
2. an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome
Definition categories: man–made
3. an apparatus or model for representing the solar systems
Definition categories: man–made, model, simulation