If you want a serious answer, the center of the galaxy is a giant black hole; its massive gravitational pull helps hold the galaxy together. But I'm not sure if it's nougat flavored.
That's, like, so last week . . .
Plasma cosmology is
were the cool kids play.
Gravity gets swapped
for electromagnetics
in Alfvén's model.
Galactic centers
might just be clustered stars, not
singularities.