Scientists just simulated what happens when a 'dead' star basically explodes back to life for a second round.
March 30, 2026
Original Paper
Formation and Evolution of [Wolf-Rayet] Planetary Nebulae through a Late Thermal Pulse
arXiv · 2603.26536
The Takeaway
When a sun-like star dies and leaves behind a shell of gas called a nebula, it's usually considered the end. These simulations show that a final 'hiccup' of nuclear fusion can reignite the star's core, sending a violent second shockwave through the old nebula and effectively bringing the dead system back to life.
From the abstract
We present the first radiation-hydrodynamical simulations of the formation of a born-again planetary nebula (PN) triggered by a late thermal pulse (LTP). The 2D radiation-hydrodynamic simulations, performed with the {\sc pluto} code, have been consistently coupled to stellar evolution calculations using the Modules for Experiments in Stellar Astrophysics ({\sc mesa}) code. Very particularly the stellar evolution model uses (i) updated opacity tables for H-deficient, C-rich mixtures during the LT