Astronomers have discovered a supernova that occurred 10.5 billion years ago, when the Universe was less than a quarter of its present age. DES16C2nm. Image credit: M. Smith / DES Collaboration. The record-breaking supernova was detected in 2016 by the Dark Energy Survey (DES), an international collaboration to map several hundred million galaxies in order to find out more about dark energy. Named DES16C2nm, it belongs to a special class called hydrogen-free...
