惑わく星せい系けい

noun

planetary system; star system

Refers to a system of planets orbiting a star, or more broadly a star system. In astronomy, 惑星系 often specifically means a planetary system, while 恒星系 is used for a star system.

See also: 恒星系

• 太たい陽よう系けいは一ひとつの惑わく星せい系けいです。

  The solar system is one planetary system.

• 天てん文もん学がく者しゃたちは新あたらしい惑わく星せい系けいを発はっ見けんした。

  Astronomers discovered a new planetary system.