What is another word for quadruple star system?
Pronunciation: [kwˈɒdɹuːpə͡l stˈɑː sˈɪstəm] (IPA) 
A "quadruple star system" refers to a collection of four stars that orbit around a common center of mass. This arrangement of stars is relatively rare, and other terms used to describe such systems include "quadruple star," "four-star system," or "tetra-star system." Beyond these straightforward synonyms, there are also more technical descriptions used by astronomers, such as "quadruple hierarchical system," which denotes a four-star arrangement in which each pair of stars orbits a center of mass that, in turn, orbits with the other pair. Other terms used to describe star systems with more than four stars include "quintuple" or "quinary" star systems.
