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double star

See more synonyms for double star on Thesaurus.com
noun Astronomy.
  1. two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star), or those that are relatively close together and comprise a single physical system (physical double star).
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Compare binary star.

Origin of double star

First recorded in 1775–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for double star

Historical Examples

  • When two stars forming a double-star are found to revolve about each other.

    The Sailor's Word-Book

    William Henry Smyth

  • He viewed them as a double-star, without yet having the coolness to separate them.

    The Son of Clemenceau

    Alexandre (fils) Dumas

  • Socrates and Plato are the double-star which the most powerful instrument will not entirely separate.

  • Somehow, he didn't mind taking one more look at the double-star system.

    Next Door, Next World

    Robert Donald Locke

  • In the main, double-star astronomy has been in the hands of amateurs, at least in England.

    The Royal Observatory Greenwich

    E. Walter (Edwared Walter) Maunder


British Dictionary definitions for double star

double star

noun
  1. two stars, appearing close together when viewed through a telescope; either physically associated (binary star) or not associated (optical double star)See also binary star, optical double star
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

double star in Science

double star

  1. See binary star.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.