What is another word for orrery?
Pronunciation: [ˈɒɹəɹi] (IPA) 
An orrery is a mechanical model of the solar system that shows the relative positions and motions of the planets and moons. Although it is a unique word, there are some synonyms for the term. One of them is planetarium, which is similar to an orrery but depicts the stars as well as the planets. Another synonym is armillary sphere, which is an ancient astronomical instrument made up of metal rings representing the celestial equator, the ecliptic, and other celestial circles. Lastly, an astrolabe, an ancient instrument, can also be considered a synonym of orrery as it was used to measure the positions of the stars and planets.
