Definition of visual binary in English:

visual binary

Line breaks: vis¦ual bin¦ary


  • A binary star of which the components are sufficiently far apart to be resolved by an optical telescope.
    More example sentences
    • These were visual binaries - stars that could be resolved by eye using a good instrument.
    • These spectroscopic binary stars are generally much closer to each other than visual binaries, as close as a few hundredths of an astronomical unit.
    • Sirius is a visual binary, and with her two different eyes, it could be cool.

More definitions of visual binary

Definition of visual binary in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
(in science fiction) navigation in outer space