Astronomical Explosion Model (IMAGE) Syracuse University Caption The explosion of a massive star leads to the expulsion of its envelope, and this “ejecta” expands outward with time and interacts with the medium surrounding the star at the time of its death. The interaction creates two shockwaves and a contact discontinuity, collectively known as a “shell,” which dissipate kinetic energy at the expense of producing more light. Eric Coughlin's new model tracks the time-dependent evolution of this shell, which can be used alongside observations of these highly energetic events to enable understanding of the physics powering astronomical explosions. Credit Eric Coughlin/Syracuse University Usage Restrictions With credit to the original source License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.