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companion star

noun, Astronomy.
companion1 (def 6).
Origin of companion star
First recorded in 1775-85 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for companion star
Historical Examples
  • The companion star is a faint white star of the ninth magnitude.

    Astronomy for Young Folks Isabel Martin Lewis
  • This change of brightness is due to the presence of a companion star.

    Astronomy for Young Folks Isabel Martin Lewis
  • "Except that we saw that companion star when we stopped back there, half an hour ago," said Fuller.

    Islands of Space John W Campbell

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