Cosmic 'String of Pearls' Reveals Secrets of Zombie Star at Supernova 1181's Heart

Astronomers are unraveling the mysteries of a rare cosmic 'string of pearls'—a glowing filamentary structure left behind by a supernova that lit up Earth's skies in 1181 AD. At its center lies a 'zombie star,' a white dwarf that survived the explosion, challenging our understanding of stellar death. New observations reveal intricate details of the remnant, known as Pa 30, including its expanding debris and the star's intense winds. The findings, published in The Astrophysical Journal Letters, show how the zombie star is heating surrounding material, creating the pearl-like clumps. This discovery provides a unique laboratory for studying Type Iax supernovae and the evolution of binary star systems. Understanding these events helps astronomers piece together the life cycles of stars and the distribution of elements in our galaxy. The research underscores the dynamic and often surprising nature of cosmic explosions, offering clues to the fate of our own Sun billions of years from now.