Simulation of Heutron-star Merger (video) University of Sydney Share Print E-Mail Loading 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. Share Print E-Mail 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.