NGC 1531/2: Interacting Galaxies . ... AURA , NSF Explanation: This dramatic image of an interacting pair of galaxies was made using 8-meter Gemini South telescope at Cerro Pachon , Chile . NGC 1531 is the background galaxy with a bright core just above center and NGC 1532 is the foreground spiral galaxy laced with dust lanes. ... These galaxies lie close enough together so that each feels the influence of the other's gravity . ... NASA Web Site Statements, Warnings, and Disclaimers . ...