planetarium

noun — 2 senses

noun

UK /plænɪˈtɛəɹɪəm/ · /plænɪˈtɛɚiəm/

Etymology Borrowed from New Latin planētārium. Equivalent to planet + -arium.

A display museum in which images of stars and other astronomical phenomena are projected onto a domed ceiling.

An orrery.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.