spectroscopic bi nary

spectroscopic binary

noun Astronomy.
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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American Heritage
Science Dictionary
spectroscopic binary   (spěk'trə-skŏp'ĭk)  Pronunciation Key 
See under binary star.
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