Hubble Image of Galaxies (IMAGE) NASA/Goddard Space Flight Center Caption Entangled among the galaxies in this Hubble image are mysterious-looking arcs of blue light. These are actually distorted images of remote galaxies behind the cluster. The collective gravity of all the normal and dark matter trapped inside the cluster warps space-time and affects light traveling through the cluster toward Earth. Credit NASA, ESA, and J. Lotz and the HFF Team (STScI) 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.