Refers to a system of stars gravitationally bound together, such as a binary or multiple star system. Not to be confused with 太陽系 (solar system) or 銀河 (galaxy).
この恒星系には三つの太陽がある。
This star system has three suns.
連星は最も一般的な恒星系の一つだ。
Binary stars are one of the most common types of star systems.