companion star

noun

, Astronomy.

First recorded in 1775–85

"Except that we saw that companion star when we stopped back there, half an hour ago," said Fuller.

This change of brightness is due to the presence of a companion star.

The companion star is a faint white star of the ninth magnitude.

This remarkable variable has a dark companion star revolving near it obscuring its light in part from us at stated intervals.

The faint white companion star formed with these three suns a system of four suns revolving about a common center of gravity.

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