binary star(redirected from Optical double)
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Related to Optical double: Binary star system
A system of two stars bound together by gravity and orbiting a common center of mass, most often appearing as a single star when visible to the unaided eye. Also called double star.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Astronomy) a double star system comprising two stars orbiting around their common centre of mass. A visual binary can be seen through a telescope. A spectroscopic binary can only be observed by the spectroscopic Doppler shift as each star moves towards or away from the earth. Sometimes shortened to: binary See also optical double star, eclipsing binary
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a system of two stars that revolve about their common center of mass.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
A system of two stars that orbit a common center of mass. The pair often appears as a single star to the unaided eye.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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|Noun||1.||binary star - a system of two stars that revolve around each other under their mutual gravitation|
star - (astronomy) a celestial body of hot gases that radiates energy derived from thermonuclear reactions in the interior
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