binary star
Definition
Noun: A system consisting of two stars that are bound together by gravity and orbit around a common center of mass.
Usage
The term "binary star" is used in astronomy to describe a specific type of stellar system. It is a technical term. * Astronomers study binary stars to understand stellar evolution. * The gravitational interaction in a binary star system can be very strong. * Many stars in our galaxy are part of a binary star system.
Examples
- Albireo in the constellation Cygnus is a famous visual .
- The two components of the eclipse each other from our viewpoint, making it an eclipsing binary.
- Scientists detected the using spectroscopic methods.
Advanced Usage
- Visual Binary: A where the two stars can be seen separately through a telescope.
- Spectroscopic Binary: A identified by the Doppler shift in its spectral lines.
- Eclipsing Binary: A system where the orbital plane is aligned so that the stars periodically eclipse each other from Earth's perspective.
Variants and Related Words
- Binary System: A more general term that can refer to any two bodies orbiting each other, such as stars, planets, or asteroids.
- Double Star: A broader term that can mean either a true or two stars that appear close together in the sky but are not gravitationally bound (an optical double).
- Multiple Star System: A system containing more than two stars (e.g., a triple or quadruple star system).
Synonyms
- Double star (though this is a broader, less precise synonym)
- Binary system (in a stellar context)
Antonyms
- Single star
- Isolated star
Noun
-
a system of two stars that revolve around each other under their mutual gravitation
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