Bubble of gas emits X-rays as it is blown away by a dying star!
Wolf-Rayet (WR) stars are massive, energetic stars at the end of their lives. They generate strong winds that sweep their surrounding material and create strong shockwaves as they collide with the interstellar medium (ISM). This process heats up the ISM to high enough temperatures to produce X-rays. This rare phenomenon was observed using XMM-Newton, ESA’s space telescope.