a domed theater in which a realistic sky is projected onto the dome

a method to bring the night sky into the classroom

a room in which images of the stars, planets, and other celestial bodies are projected

a room with a dome-shaped ceiling and at the centre of the room is a star projector

a room with a dome-shaped ceiling designed to reflect light

A building in which images of stars, planets, and constellations are projected onto a domed ceiling.

An optical device for projecting on a screen or domed ceiling the stars and planets and their apparent motions in the sky.

A planetarium is a theater built primarily for presenting educational and entertaining shows about astronomy and the night sky, or for training in celestial navigation. A dominant feature of most planetariums is the large dome-shaped projection screen onto which scenes of stars, planets and other celestial objects can be made to appear and move realistically to simulate the complex 'motions of the heavens'. The celestial scenes can be created using a wide variety of technologies, for example precision-engineered 'star balls' that combine optical and electro-mechanical technology, slide projector, video and fulldome projector systems, and lasers.