Hydra Cluster (Image and Text Credit: ROSAT/MPE) ROSAT observation of the galaxy cluster in the constellation Hydra. The X-ray intensity map taken with ROSAT is superposed onto the optical image of the central part of the cluster. The maximum of the X-ray emission coincides with the position of the two brightest elliptical galaxies at the center of the cluster. With a distance of approximately 200 million light years and a mass of nearly 4 x 1015 solar masses this galaxy cluster contributes to the gravitational attraction of the so-called Great Attractor. Search for an Image: (Enter the name of an object.) Additions or Comments: Have we left anything out? Is there something you would like to have added to this page (a link to your own group's research page, for example...)? IMAGES | By Mission | Stars | Cataclysmic Variables | X-ray Binaries | Pulsars | Supernova Remnants & Planetary Nebulae | Galaxies | Active Galactic Nuclei | Clusters and Groups of Galaxies | X-ray/gamma-ray Background & Deep Fields | Solar System Objects | Gamma Ray Bursts HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public Last modified: Thursday, 26-Jun-2003 13:48:46 EDT