... The Cloudy Cores of Active Galaxies . ... Credit Copyright: NASA's GSFC , W. Steffen ( UNAM ) Explanation: What would it look like to travel to the center of an active galaxy? Most galactic centers are thought to house black hole s millions of times more massive than our Sun. ... Publications with keywords: Galactic Center . Publications with words: Galactic Center . ... A Laser Strike at the Galactic Center . ... The Diner at the Center of the Galaxy . Kona Galaxy Garden . ...