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planetarium |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Planetarium \Plan`e*ta"ri*um\, n. [NL.: cf F. plan['e]taire. See {Planetary}.] An orrery. See {Orrery}. From WordNet r 1.6 [wn]: planetarium n 1: a building housing an instrument for projecting the positions of the planets onto a domed ceiling 2: an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome 3: an apparatus or model for representing the solar systems
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