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visual double
Variant of visual binary
a binary star that can be visually separated into its two components with a telescope or, rarely, by the naked eye: in contrast to a binary star which is so distant it requires a spectrum analysis to separate the components
also called visual double
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
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