planetarium
n. countable B2 Upper Intermediate US //ˌpɫænəˈtɛɹiəm// UK //plˌænɪtˈeəɹiəm// plan·e·tar·i·um
n. a building with a large dome that shows a model of the stars and planets. It uses special lights to make the ceiling look like the night sky.
n. a theatre or building with a large dome used for the projection of stars and planets to simulate the night sky. Often used for educational or entertainment purposes.
We visited the planetarium to see the stars.
The local planetarium offers a daily show that explains the movements of the planets in our solar system.
Modern digital planetariums use high-resolution projectors to create immersive simulations of the cosmos, allowing researchers to visualize data from deep-space telescopes in real time.
Borrowed from New Latin planētārium. Equivalent to planet + -arium.