Abstract
<jats:p>This paper presents a unified astrophysical framework detailing the life, death, and regeneration of stellar systems under the governing principles of relativistic mass-energy equivalence. By distinguishing evolutionary trajectories based on initial stellar mass, it analyzes the conversion of rest mass into thermonuclear energy during core fusion, and the subsequent transformation of intermediate stars into white dwarfs and eventual black dwarfs. This terminal phase triggers severe orbital disruptions and planetary engulfment within local solar systems. Conversely, high-mass stars culminate in cataclysmic supernova explosions driven by a surging Lorentz factor as infalling core particles approach relativistic velocities. The resulting high-energy interstellar expulsions form nebulae that act as recycling matrices, condensing under gravity to seed next-generation stars and planets. This framework confirms the perpetual thermodynamic conservation and systemic re-birth structuring our cosmos.</jats:p>