What is a binary star system?

Answer 1

'Bi' means two(2) . So a Binary Star System is two stars rotating about each other. In space the star Procyon, in the 'Little Dog ' Comnstelltion is a binary system. Procyon A is the Main Star and it has procyon B revolving around Procyon A

They are commonly referred to as the Little Dog, and the Pup.

Much nearer to home, The Earth and the Moon are thought to be a planetary binary system, because our moon is so large, compared to other moons and planets, that the Earth moves against the Moon too!!!!!

Answer 2

They are sometimes used as synonyms, but actually a double star is two stars that look as if they are close together, but may or may not be a binary star. That is, they may just happen to be in the same direction.

A binary star system is composed of two stars that are really connected, by gravity.

Answer 3

A double star is a pair that appear very close together in the sky, but that might be by chance and one of them might in fact be a lot further away than the other. A binary star is a special type of double star in which the two components are in orbit around their common centre of gravity.

Answer 4

A binary star system has two stars in the same system; our solar system has only one star.

Answer 5

A binary star system is another term for a binary star - a stellar system in which two stars orbit around their centre of mass - also known as a double star.