Neutron Stars (IMAGE) Helmholtz Association Caption Simulation of merging neutron stars calculated with supercomputers. Different colors show the mass density and the temperature some time after the merger has taken place and shortly before the object collapses to a black hole. Quarks are expected to form where the temperature and density are higher. Credit Copyright: C. Breu, L. Rezzolla Usage Restrictions None 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.