DES16C2 Nm (IMAGE) University of Pennsylvania Caption An international team of astronomers has confirmed the discovery of the most distant supernova ever detected, a huge cosmic explosion that took place 10.5 billion years ago when the universe was only a quarter of its current age. This image shows the sky before and after the explosion. Credit Mathew Smith and DES collaboration Usage Restrictions contact for permission License Licensed 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.