ibution of these galaxies and stars is crucial for the existence of life.Stars provide the energy needed for life,and planets are potential habitats for life.The expansion and cooling of the universe provide conditions for the formation of stars and planets,and also make the existence of life possible.The life cycle of stars has a significant impact on the formation and evolution of planetary systems.The light and heat of stars are one of the necessary conditions for life to exist.During the evolution of stars,planets suitable for life may be formed.For example,the formation and evolution of Earth-like planets may provide a suitable environment for life.The habitable zone theory refers to a certain distance around a star where the surface temperature of a planet is suitable for the existen
