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spectroscopic binary

noun, Astronomy
1.
a binary star having components that are not sufficiently separated to be resolved by a telescope, known to be a binary only bythe variations in wavelength of emitted light that are detected by a spectroscope.
Compare visual binary.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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spectroscopic bi-nary in Science
spectroscopic binary
  (spěk'trə-skŏp'ĭk)   
See under binary star.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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