This category contains articles about star systems, which are groups of two or more gravitationally-bound stars in a region usually smaller than one light-year. Star clusters (groups of many more stars that occupy a much larger region) are listed in Category:Star clusters. Stars with planets are listed in Category:Planetary systems.
Binary star systems are listed under the Category:Binary stars. Trinary star systems are listed under Category:Triple star systems, a subcategory of Category:Multiple star systems; star systems with four or more stars are listed under the subcategory Category:Multiple star systems.
This category has the following 3 subcategories, out of 3 total.