Solar Nebula forms the environment

It is generally believed that the first-generation stars of the Milky Way are almost entirely composed of hydrogen, while the second and third-generation stars contain many heavier nuclides in the early stages of formation. Based on the existence of many kinds of nuclides on the sun, astronomers believe that the sun is the second or third generation of stars in the Milky Way, and the heavier nuclides on the sun are from the first generation of stars in the Milky Way. Astronomical observations have shown that there are a large number of binary or multi-galaxy stars in the Milky Way, that is, two or more very close stars not only orbit the center of the Milky Way, but also move around each other.