These galactic centers, or Seyfert Galaxies, named after the astronomer Carl Keenan Seyfert, are surrounded by high-velocity stars, orbiting on irregular pathways. At its center a Seyfert galaxy has a super-massive black hole from which no light impulses escape. Thus, the stars form a kind of ”halo” — a mystery embedded within the galaxy. This mysterious glow, also emanating from Dahlem’s sculpture appears as an extraterrestrial form in contrast to the earthly forms of the outdoor urban environment. Especially at night, amid the urban landscape of the Bürgerpark, a spectacular image of ethereal spheres of light arises.