planetarium

from WordNet (r) 3.0 (2006)

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

from The Collaborative International Dictionary of English v.0.48

Planetarium \Plan`e*ta"ri*um\, n. [NL.: cf. F. plan['e]taire.
   See {Planetary}.]
   An orrery. See {Orrery}.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

22 Moby Thesaurus words for "planetarium":
      Cassegrainian telescope, Newtonian telescope, OAO, OSO,
      astronomical observatory, astronomical telescope, coelostat,
      coronagraph, coronograph, heliostat, observatory, orrery,
      radar telescope, radio observatory, radio telescope, reflector,
      refractor, spectrograph, spectroheliograph, spectrohelioscope,
      spectroscope, telescope

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