Planetarium is an apparatus or model representing the solar system. It describes the optical device used for projecting images of celestial. The projection of the solar system is commonly done for entertainment or education.
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what is the definition of planetarium
NOUN [PLURAL PLAN·E·TAR·I·UMS, PLAN·E·TAR·I·A]
an apparatus or model representing the planetary system.
a device that produces a representation of the heavens by the use of a number of moving projectors.
the building or room in which such a device is housed.
A planetarium (plural planetaria or planetariums) is a theatre built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation...