i*ution of these gala**es and stars is crucial for the e**stence of life.Stars provide the energy needed for life,and planets are potential ha**tats for life.The expansion and cooling of the universe provide conditions for the for**tion of stars and planets,and also **ke the e**stence of life possi*le.The life cycle of stars has a significant impact on the for**tion and evolution of planetary systems.The light and heat of stars are one of the necessary conditions for life to e**st.During the evolution of stars,planets suita*le for life **y *e formed.For example,the for**tion and evolution of Earth-like planets **y provide a suita*le environment for life.The ha**ta*le zone theory refers to a certain distance around a star where the surface temperature of a planet is suita*le for the e**sten