| abstract
| - In 2152, the Enterprise engaged the Klingon D5 class battle cruiser IKS Bortas in the ring system of a gas giant. (ENT: "Judgment") In 2371, the crew of the USS Voyager discovered a new element in the ring system of a class D planet in the Delta Quadrant. (VOY: "Emanations") The rings of the Ba'ku planet had special metaphasic properties that stopped the aging process for the inhabitants, the Ba'ku. In 2375, the Son'a, with the help of Starfleet Admiral Matthew Dougherty, attempted to collect the radiation for their own purposes, which would leave the planet uninhabitable. However, Captain Picard and the USS Enterprise-E were able to stop them before they could enact their plan. (Star Trek: Insurrection)
- thumb|Planet Yerek, eine Welt aus dem Zarkov Sektor mit einem Ring SystemEin Ring System war eine Ringförmige Gruppe von Asteroiden, Staub und anderen kleinen Partikeln in der Umlaufbahn eines Planeten.
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