详细解释:n. 行星仪, 天文馆, 天象图
词型变化：
名词复数:planetariums英语解释：
名词 planetarium:
a building housing an instrument for projecting the positions of the planets onto a domed ceilingan optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical domean apparatus or model for representing the solar systems例句：
On his days off he takes them to the Museum of Natural History or the Planetarium.他休假的日子，就带他们去自然历史博物馆或是天文馆。