Binary Star System Supernova Explosion (IMAGE) University of California - San Diego Caption A simulation of a possible explanation for an L subdwarf named CWISE J124909+362116.0's speed shows it as a part of a white dwarf binary pair that ended with the white dwarf exploding into a supernova. Credit Adam Makarenko / W.M. Keck Observatory Usage Restrictions editorial use only 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.