physical double star

noun

See under double star.

Words nearby physical double star

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Definition for physical double star (2 of 2)

double star

noun Astronomy.

two stars that appear as one if not viewed through a telescope with adequate magnification, such as two stars that are separated by a great distance but are nearly in line with each other and an observer (optical double star), or those that are relatively close together and comprise a single physical system (physical double star).
Compare binary star.

Origin of double star

First recorded in 1775–85

British Dictionary definitions for physical double star

double star

noun

two stars, appearing close together when viewed through a telescope; either physically associated (binary star) or not associated (optical double star) See also binary star, optical double star

Scientific definitions for physical double star

double star

See binary star.