How Many Suns Can a Planet Have?

Is it possible for alien planets to have four, five, six or even more suns? "It all depends on the hierarchy," said Kaitlin Kratter, a computational astrophysicist at the University of Arizona, who was part of the team that discovered the new three-sun planet, called HD 131399Ab. Such worlds can get tugged hither and yon by a host of different gravitational interactions.