planetarium
Pronunciation: /ˌplanɪˈtɛːrɪəm/
noun ( plural planetariums or planetaria /-rɪə/)
- 1a domed building in which images of stars, planets, and constellations are projected for public entertainment or education.
- a device used to project images of stars, planets, and constellations.
- 2another term for orrery.
Origin:
mid 18th century: modern Latin, from Latin planetarius 'relating to the planets'