Galaxy Cluster Lenses Farthest Known Galaxy . ... Credit Copyright: ESA , NASA , J.-P. Kneib ( Caltech / Observatoire Midi-Pyrenees ) R. Ellis ( Caltech ) Explanation: Gravity can bend light, allowing whole clusters of galaxies to act as huge telescopes. Almost all of the bright objects in this just- released Hubble Space Telescope image are galaxies in the cluster known as Abell 2218. ... NASA Web Site Statements, Warnings, and Disclaimers . NASA Official: Jay Norris. ...