double star

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Noun

double star (plural double stars)

1. (star) Two stars which form a stellar system, such that they orbit the point of equilibrium of their gravitational fields; a binary star.
2. (star) Two stars that appear to be one when seen with the naked eye, either because they orbit one another (binary stars) or happen to be in the same line of sight even though they are separated by a great distance (optical binaries).

Synonyms

• (star system) binary, binary star, double star system, binary star system

Related terms

• single star, single star system
• triple star
• multiple star

Translations

• French: étoile double, étoile binaire
• German: Doppelstern
• Portuguese: estrela dupla
• Russian: двойна́я звезда́
• Spanish: estrella doble

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