- 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).
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
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
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
- See binary star.
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