planetarium
/ˌplænɪˈtɛriəm/
noun
- A building or room with a domed ceiling onto which images of stars, planets, and other celestial objects are projected for educational or entertainment purposes.
- Our class took a field trip to the planetarium to learn about constellations.
- She loved visiting the planetarium because the star projections made her feel like she was in space.
- The planetarium show took us on a journey through the solar system.