double star

English

Noun

double star (plural double stars)

1. (astronomy) Two stars which form a stellar system, such that they orbit the point of equilibrium of their gravitational fields; a binary star.
2. (astronomy) 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

Derived terms

• double star system

Related terms

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

Translations

double star

• Basque: izar bikoitz
• Catalan: estrella doble f, estel binari m, estel doble m
• Chinese:

  Mandarin: 雙星／双星 (zh) (shuāngxīng)

• Esperanto: duobla stelo
• Finnish: kaksoistähti (fi)
• French: étoile double (fr) f, étoile binaire (fr) f
• German: Doppelstern (de) m
• Irish: réalta dhúbailte f
• Japanese: 二重星 (ja) (にじゅうせい, nijūsei)
• Portuguese: estrela dupla f
• Russian: двойна́я звезда́ (ru) f (dvojnája zvezdá)
• Spanish: estrella doble f
• Swedish: dubbelstjärna (sv) c

See also

• star system

References

• "double star" in the Dictionary.com Unabridged, v1.0.1, Lexico Publishing Group, 2006.
• Random House Webster's Unabridged Electronic Dictionary, 1987-1996.