Young Globular Clusters (IMAGE) The University of Hong Kong Caption Young globular clusters (ages up to 1 billion years) are indicated by the blue dots. These globular clusters are closely associated with a filamentary network of cool gas, colored orange to white, which extends to the outer reaches of the giant galaxy at the center of the Perseus galaxy cluster. Round or oval objects, also colored orange to white, are smaller galaxies that are part of the same galaxy cluster. Credit @The University of Hong Kong Usage Restrictions Please credit @The University of Hong Kong when using the image 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.