1734, "orrery," Modern Latin, from Late Latin planeta (see planet) + Latin -arium "a place for." Sense of "device for projecting the night sky onto the interior of a dome" is attested from 1929.
实用例句
1. The planetarium staff also prepared talks for radio broadcast.
天文馆的工作人员还要准备讲稿给电台广播.来自《简明英汉词典》
2. The four - building complex will include a library, a museum, an auditorium and a planetarium.