An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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planetary ring system
  راژمان ِ حلقه‌های ِ سیاره‌ای  
râžmân-e halqehâ-ye sayyâre-yi
Fr.: système d'anneaux planétaires  

→ Interplanetary dust and other small particles organized into thin, flat rings encircling a planet. The most spectacular planetary rings known are those around → Saturn, but the other three → giant planets
of the solar system (→ Jupiter, → Uranus, and → Neptune) have their own ring systems.

See also: → planetary; → ring;
→ system.