Simulation of NGC6101 without Black Holes (IMAGE) University of Surrey Caption This picture is from the computer simulation of the cluster NGC 6101 with all of its black holes removed from the cluster at its current age: The center of the star cluster looks more concentrated than observed in the Hubble Space Telescope image of that cluster. Apparently this simulation is missing something and therefore cannot recreate the observed properties of the cluster. Credit University of Surrey 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.