 This image shows the diverse collection of galaxies in the cluster Abel S0740. The giant elliptical ESO325-G004 looms large at the cluster center. In the course of analyzing this Hubble image, astronomers discovered that ESO325 is actually a gravitational lens. This means that the focusing power of the enormous mass making up the galaxy caused the light from some distant object, probably a distant dwarf galaxy, to be deflected and magnified. As a result, the more distant galaxy appears brighter and distorted into the shape of an arc or ring known as an Einstein ring because the phenomenon was first predicted by Albert Einstein. Thank you for watching!