Ejecta (IMAGE) DOE/Los Alamos National Laboratory Caption When neutron stars merge, they can produce radioactive ejecta that powers a kilonova signal, as this conceptual image shows. A recently observed gamma-ray burst looked like the emissions from a supernova but turned out to signal a previously undetected hybrid event involving a kilonova Credit Dreamstime Usage Restrictions Editorial 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.