Binary stars are very useful for determining the mass of the stars and thus any objects orbiting around them.
the orbits of binary stars
No
their orbits in binary systems
Stellar masses can be determined by observing binary star-systems. The calculations of the orbits of the binary stars allow the masses of their component stars to be directly determined, which in turn allows other stellar parameters, such as radius and density, to be indirectly estimated.
Binary stars can be any color that stars can be. There's no need for the two stars in a binary to be the same color.
do you mean a purple star?? then the answer would be no!! If you mean is it possible that there is a red and blue Binary star system, where one orbits the other. Then the answer would have to be yes as there are no rules governing how a binary system is formed
Two stars orbiting each other are "binary stars" ...a group of stars near each other, may be formally or informally known as a "cluster".
Binary stars
Two stars that are close together will orbit each other. More precisely, they will orbit around their common center of mass. The two stars are called a binary star in this case.
Yes all binary stars are part of the star system because all galaxies and universes have stars and you have to have at least two stars for it to be binary stars.
Binary what? Binary numbers? Binary stars? Binary fission?
About 50% of all stars are binary stars - they all have different temperatures.