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• n  a system of two stars that revolve around each other under their mutual gravitation

• binary star
• binary

News & Articles

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• Nearby Double Star Fomalhaut Is Actually a Triple
  The nearby star system Fomalhaut -- of special interest for its unusual exoplanet and dusty debris disk -- has been discovered to be not just a double star, as astronomers had thought, but one of the widest triple stars known.
  Oct. 5, 2013 - SpaceRef
• Bright nearby double star Fomalhaut is actually a triple
  The nearby star system Fomalhaut -- of special interest for its unusual exoplanet and dusty debris disk -- has been discovered to be not just a double star, as astronomers had thought, but one of the widest triple stars known.
  Oct. 4, 2013 - Science Daily