Galaxy merger Arp-Madore 417-391 is on display in this new image captured by the Hubble Space Telescope's Advanced Camera for Surveys (ACS). The merger is about 670 million light-years away from Earth.br br Credit: ESAHubble & NASA, Dark Energybr SurveyDOEFNALDECamCTIONOIRLabNSFAURA, J.