Black hole billiards in the centers of galaxies

Around a monster black hole, smaller black holes collide in strange ways

Chaotic Triple Drama: Black Hole Billiards in the Centers of Galaxies

New research could help explain how galaxies might be able to exist without dark matter, which was once thought impossible. Researchers report how, when tiny galaxies collide with bigger ones, the bigger galaxies can strip the smaller galaxies of their dark matter.