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Definition of "binary star" []

  • A stellar system consisting of two stars orbiting about a common center of mass and often appearing as a single visual or telescopic object. Also called double star. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Use "binary star" in a sentence
  • "Its a binary star systemthe one you see shining in the sky is a yellow dwarf star, just like our Sun."