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   Plan·e·tar·i·um

   /ˌplanəˈterēəm/

   

   noun

   • 1. a building in which images of stars, planets, and constellations are projected on the inner surface of a dome for public entertainment or education.
   • ▪ a device used to project images of stars, planets, and constellations.
   • 2. another term for orrery

   Word Origin mid 18th century: modern Latin, from Latin planetarius ‘relating to the planets’.

   Scrabble Points: 15

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