The Double Worlds or Twin Worlds was a phrase used to refer to the planets Tralus and Talus, which orbited Centerpoint Station as it orbited the star Corell in the Corellian system. Double Worlders was the name given to citizens of either world.
They were two of the Five Brothers. It was believed that the Celestials moved the planets into Corell's orbit from other places in the galaxy, along with three other planets; all kept in place by the Centerpoint Station.
In 500 BBY, the Federation of the Double Worlds was founded—the government of Talus and Tralus. The Federation capital is Dearic on Talus.
During the Corellian Crisis in 18 ABY, the Tralus and Talus Liberation Party advocated independence for both worlds.
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- Star Wars: X-Wing Second Edition — Scum and Villainy Conversion Kit