Simulation of Heutron-star Merger (VIDEO) University of Sydney This video is under embargo. Please login to access this video. Caption A simulation of a neutron-star merger creating a broad outflow -- a 'cocoon'. A cocoon is the best explanation for the radio waves, gamma rays and X-rays the astronomers saw arising from the neutron-star merger GW170817. Credit Ehud Nakar (Tel Aviv), Ore Gottlieb (Tal Aviv), L. Singer (NASA), Mansi Kasliwal (Caltech) and the GROWTH collaboration Usage Restrictions For this story only. 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.