The theory or hypothesis related to the origin of the Earth, from two or more stars, which is believed to be the source of the solar system and Earth, is called Binary theory. According to this principle, the formation of the solar system is believed to be by the second transitory star, near the sun. Most hypotheses of this class were rendered in the beginning of the twentieth century. The concepts of scientists such as Chamberlain and Molton, James Jeans, Jeffrey, Russell, etc. are included under this hypothesis.