Binary stars are a system of two stars that orbit around a common center of mass. They are an important area of research in astronomy, as they provide valuable insights into the formation and evolution of stars, as well as the dynamics of stellar interactions. The study of binary stars allows astronomers to measure properties such as mass, radius, temperature, and luminosity of the stars, which can then be used to understand various astrophysical processes. Binary stars come in various types, including visual binaries (where both stars can be seen separately), spectroscopic binaries (where only one star can be seen but their spectra reveal the presence of a companion), and eclipsing binaries (where the stars periodically pass in front of each other, causing changes in brightness). By studying the orbital dynamics and characteristics of binary stars, astronomers can learn more about stellar formation, evolution, and interactions, as well as gain insights into the broader field of stellar astrophysics.