Binary system

A binary system (or binary star) was a star system consisting of two stars.

Sirius was, as the Eleventh Doctor pointed out to Henry Avery, a binary system. (TV: The Curse of the Black Spot)

The Althosian system (PROSE: The Pit) and the Meson system (PROSE: Time of Your Life) were binary star systems. Major and Minor were the stars in the binary system which contained the planet Trion. (PROSE: Turlough and the Earthlink Dilemma)

Lucie Miller hoped that her first visit to another planet would be to one that had two suns. (AUDIO: Blood of the Daleks)

Planets with two suns included Anubis, (TV: Curse of Anubis) Aridius, (TV: The Chase) Caresh, (PROSE: The Suns of Caresh) Coralee, (PROSE: Storm Harvest) Corbo, (PROSE: The Devil-Birds of Corbo) Dido, (PROSE: The Rescue) Gallifrey, (TV: Gridlock) a human colony planet, (TV: Smile) the planet of the Gonds, (TV: The Krotons) Kandalinga, (PROSE: The Fishmen of Kandalinga) Lobo, (PROSE: The Good Doctor) the Sense Sphere, (PROSE: The Monsters from Earth) and Skaro. (PROSE: The Stranger)

The film Star Wars featured a scene in which twin suns set over the Tatooine desert. (PROSE: Mission: Impractical)