A binary star of which the components are sufficiently far apart to be resolved by an optical telescope.
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Example sentencesExamples
To the southeast of Algol lies a visual binary system, and surrounding this binary system is a patchwork of various stars making up the corner of the Milky Way called the Western Link.
These were visual binaries - stars that could be resolved by eye using a good instrument.
The telescope, although not fully functional, is normally used for research on visual binary stars and for undergraduate student assignments.
Sirius is a visual binary, and with her two different eyes, it could be cool.
These spectroscopic binary stars are generally much closer to each other than visual binaries, as close as a few hundredths of an astronomical unit.
Definition of visual binary in US English:
visual binary
noun
Astronomy
A binary star of which the components are sufficiently far apart to be resolved by an optical telescope.
〔天文〕目视双星
Example sentencesExamples
The telescope, although not fully functional, is normally used for research on visual binary stars and for undergraduate student assignments.
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.
To the southeast of Algol lies a visual binary system, and surrounding this binary system is a patchwork of various stars making up the corner of the Milky Way called the Western Link.