planetarium

Everyday

1. A planetarium is a building with a round domed ceiling where pictures of the stars, planets and night sky are shown, so people can learn about space. tree →
2. It can also be the machine that projects the sky onto the dome. tree →

In the lessons

In science and on school trips, the planetarium shows the night sky, constellations and planets; it tells the reader that the scene is about space learning. Phrases: a trip to the planetarium, the planetarium show.

Examples

• Our class went on a trip to the planetarium. tree →
• At the planetarium we lay back and looked at the stars. tree →
• The planetarium show was about black holes. tree →
• The dome of the planetarium went dark. tree →
• We saw how the sky changes through the year in the planetarium. tree →
• The planetarium is next to the science museum. tree →

Note

Countable; plural «planetariums» (common) or «planetaria» (formal). Say plan-uh-TAIR-ee-um. A planetarium shows a picture of the sky; an observatory has real telescopes.