Union Star
Star is the star of two stars in the orbit around the common mass center of the star system, the brighter one called the main star, and the other called companion, companion, or second star. Studies from the early nineteenth century show that most stars, if not Star, are more than two stars composed of more than two stars. The name of the binary star can be used as synonym for the Union, but in general, the binary may be a star, it can be no physical correlation, but from the Earth observation is together with the optical binary. Double stars if there are different self, radial speed or parallax, from the measurement can still show and the earth has enough different distance, you can confirm the optical binary. Many binary stars have not yet confirmed that each other is bound to the Star system or optical binary. ...