This image, supplied by NASA and the European Space Agency, Thursday, Oct. 12, 2006, shows the Spiderweb Galaxy sitting at the center of an emergent galaxy cluster, surrounded by hundreds of other galaxies from the cluster.The image provides a dramatic glimpse of a large massive galaxy under assembly as smaller galaxies merge. This has commonly been thought to be the way galaxies grew in the young Universe, but now the Hubble observations of the radio galaxy MRC 1138-262, nicknamed the Spiderweb Galaxy, have shown dozens of star-forming satellite galaxies in the actual process of merging. The image is a composite of many separate exposures made by the Hubble Space Telescope.(AP Photo/NASA- ESA)