 This is ESL 137-001, a part of the Norma Galaxy cluster. The image not only captures the galaxy and its backdrop in stunning detail, but also includes intense blue streaks streaming outwards from the galaxy, seen shining brightly in ultraviolet light. These streaks are actually hot young stars encased in wispy streams of gas that are being torn away from the galaxy by its surroundings as it moves through the Norma cluster. This violent galactic star extraction is due to a process known as ram pressure stripping, a drag force felt by an object moving through a fluid. The fluid in question here is superheated gas that exists at the center of galaxy clusters.